Trouble P0030 - Oxygen Sensor Heater 1 Bank 1 - Circuit Malfunction

What does P0030 mean?

Trouble code P0030 is a general trouble code that indicates that the engine control module (ECM) has detected a malfunction in the oxygen sensor 1 (bank 1) heater circuit. The vehicle's ECM uses an oxygen sensor to monitor the oxygen content of the vehicle's exhaust gases. The ECM uses the signal received from the oxygen sensor to regulate the fuel/air mixture ratio of the engine. The most optimal ratio of air and fuel in the mixture supplied to the engine cylinders is 14.7:1. It is this ratio that is necessary to achieve maximum engine power and optimal fuel consumption.

The oxygen sensor heater is used to heat the internal components of the oxygen sensor to provide faster feedback to the vehicle's ECM. This is necessary to reduce emissions of harmful substances from the vehicle's exhaust gases when starting the engine, especially if the engine is started in a cold state.

How to find a fault

Checking the positive contact of the oxygen sensor heater

First of all, it is worth checking the voltage in the connecting block of the first lambda and the presence of oxides; it happens that after cleaning the contact with a special product, the problem goes away. It is also worth checking the performance of the sensor itself by measuring the resistance.

To check the lambda probe wire, you need to disconnect two parts of the connecting block. We do not touch the part that goes down to the “female” sensor, but take measurements on the “male” block, the wires of which lead to the ECU.

With the ignition on, use a multimeter to check what voltage is supplied through the wires from the computer to the sensor heating element. To do this, select the voltage measurement mode of 20 V on the device and take readings on the contacts one by one. We attach the black probe to ground to the body, and connect the red probe to the upper right contact (if the block is not twisted, this will be the positive contact of the sensor heater). It should show a little more than 12 V. The diagonally opposite, lower left contact also goes to the heater and it should show a voltage of no more than 3.27 V.

When connected to the upper left contact, the multimeter will show a very small value - 0.02 V. After this, connect the probe to the opposite, lower right contact - there the voltage should be about 0.45 V. This is the contact of the oxygen sensor, which analyzes the level of oxygen in the exhaust gases and transmits the reference voltage directly to the ECU. After this, the system adjusts the fuel-air mixture based on the data received.

The oxygen sensor reference voltage should always be checked with the engine warm!

You can also check the male block by selecting the ringing mode on the multimeter. If all contacts ring, then the wire is in normal condition, and the problem most likely lies in the oxygen sensor itself.

To check the lambda probe itself, select the resistance measurement mode of 200 Ohms on the multimeter. We connect the red probe to the upper right contact, and the black one to the lower left , both go to the lambda heater (on most cars these wires are white). Normally, the resistance of the working sensor should be 3.3-3.5 Ohms. More details about checking the lambda probe can be found using the example of Ford Mondeo 1 here.

How does a mechanic diagnose a P0030 code?

First, the mechanic reads all the stored data and error codes using an OBD-II scanner. He will then clear the error codes from the computer's memory and test drive the vehicle to see if P0030 appears again . If the error code appears again, the mechanic will visually inspect the heated oxygen sensor for damage, as well as check the ground and measure the voltage at the sensor.

The mechanic will then carefully check any associated electrical wires that may have been damaged due to excessive heat due to high exhaust temperatures.

How to understand that there are multiple misfires on cylinders

You can understand that there is a misfire in the cylinders by the following signs:

• Presence of detonation.
• The engine became difficult to start.
• Reduced power.
• Dips when accelerating.
• Increased engine vibration during operation.

Depending on the reason that caused deviations in engine operation, the exhaust gases may also turn black. A misfire will certainly have a negative impact on the economic performance of the power plant.

How serious is P0030?

When a P0030 , the Check Engine light on your vehicle's dashboard will illuminate, indicating a problem. Failure of the heated oxygen sensor may cause the vehicle's ECM to not be able to properly regulate the fuel/air mixture in the engine. The vehicle's engine may run erratically. It may also increase fuel consumption and damage other vehicle components. If this code is detected, it is recommended that you contact a qualified technician as soon as possible to diagnose and resolve the error.

Often, if the Check Engine Light comes on immediately after starting the engine, the OBD-II system can be reset and the vehicle will continue to operate normally.

Reasons for the error

If the diagnostic scanner detected code P0030 immediately 30 seconds after the engine started, this may indicate several common causes.

Main reasons:

• A break in the wire of the first lambda sensor or lack of contact in its connector.
• The lambda wire is shorted to ground.
• The sensor heater fuse has blown (mostly installed on VAG models).
• The oxygen sensor heater itself is faulty - check the resistance (should be no less than 3 Ohms and no more than 35 Ohms).
• The type of sensor does not match the standard one installed from the factory - check and replace with a suitable one. This problem often occurs on Subaru cars when an analogue lambda is installed; the error can be eliminated only after replacing it with the original.
• The data bus to the controller that controls the sensor is faulty. Or an incompatible controller is installed - replace the ECU.
• The controller has the wrong firmware installed.

Where to look for a fault

In some cases, the P0030 code may be displayed without any disturbance in the vehicle's dynamics. All systems are working normally, the flow rate does not change, but the code is generated. In this case, you need to check several main possible causes of the error:

1. The wire may break in the area from the probe to the connecting block. You need to disconnect the connector and check the contacts with a multimeter. If the sensor is in order, then it should ring without problems.
2. The wire in the area from the connecting block to the ECM may be frayed or one contact may be broken. You also need to remove the wire and check whether the contact is coming to the block - whether there is resistance.
3. The problem is in the block itself. For example, the VAZ 2114 has the 2111-1411020-81 January 7.2 unit installed, which is characterized by the problem of the TLE6240GP B1 chip burning out. To solve the problem, you will have to take the unit to a specialist so that he can resolder this microcircuit, since they can often fail. The price of the microcircuit itself is on average from 300 to 500 rubles.

What repairs can fix the P0030 code?

To resolve the P0030 you may need to:

• Clearing error codes from the ECM and test driving the vehicle to see if the P0030 again
• Heated Oxygen Sensor 1 (Bank 1) Replacement
• Repair or replace electrical wires or connector for heated oxygen sensor 1 (bank 1)
• Replacing the fuse in the oxygen sensor 1 heater circuit (bank 1)
• In rare cases, replacing the engine control module (ECM)

Priora fault codes: decoding

Standard errors are displayed on the car's dashboard. There is an on-board computer display where faults on board are displayed.

To view errors on the device, enter the special menu. Through it you can read the serial number of the problem and find out what it means.

The following are encodings that can be considered a diagnostic scanner.

Error exclamation mark on Priora

The indicator in the circle indicates the need to add fluid to the brake system expansion tank. If the equipment of the car has changed, the symbol may indicate a problem with the power steering.

When adding brake fluid, it is recommended to check the lines for fogging or leaks. It is imperative to eliminate them.

C0110 - malfunction

Failure of the relay circuit for activating the ABS system valves. The module may fail or operate incorrectly. Driving with this damage is strictly not recommended.

Error C0161

The brake signal switch circuit is faulty. Usually the problem is hidden in oxidation of contacts or wear of the frog. The situation can be corrected by replacing the part or cleaning the contact groups. Buying a new module usually costs pennies and does not cause difficulties when replacing it.

C0640 - malfunction

The ABS wheel sensor is broken. The sensor is located on the steering knuckle and often fails due to clogging or damage from road debris.

C1011 - EUR malfunction

Error 1011 indicates a damaged engine speed indicator circuit. Check the wiring and eliminate breaks.

C1021 - malfunction

The torque sensor output voltage is below the specified limit. The sensor must be checked or replaced with a known good one.

Code C1023

Typical power failure of the EUR head module. The system should be thoroughly diagnosed.

Error C1024: how to treat

Lack of power to the EMUR torque sensor. Code 1024 indicates damage to the wiring or severe oxidation of the contact group of the block.

C1045 - malfunction

Break in the phase windings of the electric motor with a short circuit. Masters change the entire engine. There are craftsmen who restore motors.

Error C1054

This indicates a break in the phase windings of the electric power steering motor.

Malfunction C1058

Interturn short circuit of the phase windings of the EUR drive. The problem is treated by completely replacing the unit.

C1640 - malfunction

EPROM failure, memory write error.

U0001 - malfunction

The code indicates a breakdown of the CAN bus from the head module to the device. It is necessary to completely ring the lines and eliminate the breakdown.

U0121 - malfunction

Communication with the ABS module is lost. It is necessary to check the control and signal transmission circuits.

B0028 - malfunction

The fog lamp relay is damaged or there is a break in the power line touching the ground.

B0030 - malfunction

The additional signal relay has a break in the power line with contact with body ground.

Priora B0031 - communication error with driver's door module

Standard MDV failure, indicating that there is no connection via LIN. Check the system and eliminate oxidation and wiring breaks.

B0033 - malfunction

There is a problem with communication with the CSUD, the W-line signal is lost. The problem can be resolved by checking the immobilizer.

Error B0052

There is no voltage in the on-board network. Here you need to check the entire line for breaks and damage. It is also recommended to check the fuse panel first.

B1021 - error

Indicates that there is a problem with the driver's airbag. The light on the dashboard in the shape of a “fat man” is on. To fix the problem, check the squib igniter circuit and eliminate the defects.

B1040 - malfunction

Intermittent signal from the driver's airbag deployment sensor.

B1042 - malfunction

Incorrect voltage on the driver airbag controller. The problem should be found in the battery or generator.

Error 3

The fuel level sensor is not working properly. Disassemble the module and check it for damage.

Error 4 on Priora

Appears on cars with air conditioning and on models without a cooler. With this problem, the car indicates that there are problems with the DTO. The sensor is located in an area of ​​high vibration and is subject to mechanical damage.

Error number 5: Priora sixteen-valve

The outside temperature sensor is faulty. Check the wiring first.

Breakdown 6

Excessive overheating of the power plant. Stop and let the engine cool. Check the antifreeze level in the radiator.

Error 7

The emergency oil pressure sensor in the crankcase of the power plant has tripped. If the level is normal, this may be due to the following problems:

• oil pump malfunction;
• the oil is too thin;
• the working mixture has worked and lost its viscosity properties.

Error 8

There is a defect in the brake system. A complete diagnosis of the device is required.

Breakdown 9

The battery is discharged or the battery is critically worn out.

Error 12

It is a combination of codes 9 and 2, which indicates improper operation of the battery or charging relay.

Fault 17

It is a combination of two or three problems at the same time. A more thorough diagnosis of the system is needed.

Error 34: Priora 16 valves, manufactured in 2008

Simultaneous appearance of codes 3 and 4. The decoding is indicated above.

Fault 45

Same meaning as the description above.

Code 78

The standard combination of ciphers 7 and 8.

Code 89

It is a combination of several errors. For a full diagnosis, a more thorough study of the on-board equipment is required.

Code 234

The instrument control module is not working properly. System diagnostics needed.

2345 - error

Standard fault code for on-board panel. Review the wiring and fix any problems.

Code 345

ECU system error. The module requires more careful study.

Code 789

A typical picture is a combination of several problems from a standard series of breakdowns at the same time.

Code 5011

The engine speed signal sensor is damaged or does not work correctly.

Code P0030

Indicates an open circuit in the DK1 control circuit.

Code P0031

There is a similar problem with the body touching ground.

Priora: fault P0036

DK1 is not working correctly. Indicates that there is a breakdown in the module itself.

Error 004

DTOZH does not work correctly. The entire module will need to be replaced.

Error P0101

Indicates problems with the mass air flow sensor. Check the sensor line and sensor.

Error P0102

The on-board network receives too weak a signal from the mass air flow sensor.

Malfunction P0103

Indicates a reverse problem with the module. It is treated in the same way.

Malfunction P0113

The intake air temperature sensor is not working correctly. Accurate diagnosis of the sensor is required.

Code P0118

The engine temperature sensor is faulty. The code may indicate overheating of the power plant.

Malfunction P0122

TPS – signal level is too low. The code indicates that there is a problem with the throttle. Damage can be eliminated by simply cleaning the device from dirt.

P0130 - code

Indicates that DC1 has failed or there is a critical violation of the integrity of the wiring.

Malfunction P0132

Excessively high signal from DC1. Indicates that the signal wire is shorted to the power line.

Code P0133

The first lambda probe takes too long to respond to commands.

Error P0134: what needs to be changed

This indicates a complete loss of signal from DC1. This is due to oxidation of the wiring or broken cords.

Code P0135

DK1 heater malfunction. You need to check the module's power circuits.

Error P0140

The signal from the oxygen sensor to the converter arrives intermittently or unevenly. Test the sensor for problems.

Code P0171

There is a lean mixture. This happens when air is sucked into the system. To troubleshoot, you need to completely check the fuel line for damage and loss of tightness.

Error P0172: Solving the Problem

Excessively rich fuel mixture. The engine is literally flooded with fuel. To get rid of the problem, dig into the settings of the injector and BC. It would not be superfluous to check the air filters; if the elements are clogged, the system will be over-enriched with fuel.

Error P0203

Open circuit for controlling the injector of the third combustion chamber. Check the chain for damage.

P0204 - code

The same value is only for cylinder 4.

Error P0222

The TPS is transmitting incorrect data. Perform a thorough system diagnostic.

P0300 - VAZ Priora malfunction

Indicates the presence of multiple misfires in the cylinders.

Malfunction P0301

Similar value for the first cylinder.

Malfunction P0302

The code indicates a misfire in the second combustion chamber.

Malfunction P0303

The same goes for the third cylinder.

Code P0304

Fourth piston – misfire.

P0326 - malfunction

The knock sensor has failed. You need to replace the device with a new one or fix wiring problems.

Malfunction P0327

The signal from the knock sensor is too low.

Code P0328

The opposite meaning from the above point.

Error P0335

DPKV - no signal. The wiring is broken or the terminal has come loose.

Malfunction P0336

Excessively low signal from the crankshaft position sensor.

Code P0340

Indicates a problem with the camshaft position sensor system.

Code 0342

Low signal level from the above element.

Code P0343

0343 has the opposite meaning. Here there is a short circuit of the control line to the power circuit.

P0346: error

The automatic transmission control module registers an incorrect signal from the DPRV.

Code P0351

Malfunction of ignition coil A - damage to one of the windings. If there are problems, the entire coil is replaced.

P0363 - error

Multiple misfires have been detected and fuel supply to the damaged cylinders has been cut off.

Code P0422

The effectiveness of the neutralizer is below the established threshold. The catalytic converter is clogged and requires repair.

Code P0441

The air flow at the canister purge valve is too high.

Code P0444

This indicates a short circuit in the canister purge valve circuit.

P0485 - code

The coolant temperature sensor is not working properly.

Code P0500

Indicates a speedometer failure. The electronic system is damaged.

Code P0504

Owners of cars with an electronic gas pedal often encounter this error. The problem indicates a mismatch in the brake signals. The malfunction is treated by replacing the sensor or drive spring.

Code P0506

The automatic transmission control module has detected an incorrect idle speed. This occurs when the mixture is overly rich or lean.

Code P0507

Idle speed too high. Check the throttle settings and the condition of the car's electronic systems.

Code 0511

Typical code for a breakdown of the XX regulator. After replacing the device with a new one, the problem goes away.

P0523 - error

High voltage at oil pressure sensor. Perhaps the indicator in the highway exceeds the set value. If the system works stably, you need to change the sensor.

Code 0560

The voltage in the on-board electrical network is below the established minimum. This happens if the battery is discharged or there are problems with the generator set.

Code P0562

Voltage sag in the on-board network. There may be a malfunction in the contact groups of the relays or fuses.

Code 0650

Llama Check control circuit is faulty. It is necessary to check the entire line for damage or breaks in the circuit.

Code P0660

The intake manifold geometry change valve driver is faulty or its wiring is shorted to body ground.

Code P0830

The clutch pedal sensor has failed. Error 0830 can be corrected by standard sensor replacement.

P300 error

The ignition order in the cylinders is disrupted - multiple misfires are detected.

Code P1135

The DK1 heater circuit is damaged. System diagnostics required.

P1141 error

Indicates critical overheating of the catalytic converter. This can happen due to overly aggressive driving during the summer heat. The block simply does not have time to cool to the required temperature.

Code P1301

Multiple misfires in the first cylinder. Check the ignition system completely.

Code p1304

Similar to the point indicated above, only for 4 cylinders.

Code 1426

The canister purge valve control circuit is faulty.

Code P1513

Short circuit of the idle air control control circuit to body ground.

Code P1514

Code 1514 indicates an open circuit in the IAC control circuit.

Code P1545

The actual throttle position differs from the set value. To do this, you need to clean the throttle and replace worn parts.

P1558 - error

The throttle return spring is faulty.

P1570 - error

The response from the APS module does not come to the control unit.

Code 1579

Controller training was interrupted at an invalid stage. The problem needs to be resolved at a service station. Self-repair will not bring results.

Code P1602

The problem indicates a loss of voltage in the controller power supply circuit. Checking the terminals for oxidation will help correct the situation.

P1617 - error

Excessively high signal from the rough road sensor. Usually drivers simply turn it off or remove it from the car.

P2127 - error

The signal level from the gas pedal sensor is too low. Here the wiring is checked and the signaling device is replaced if necessary.

Code P2135

Indicates a mismatch between sensors 1 and 2 of the gas pedal position. It is necessary to check the integrity of the sensors and their wiring.

P2187 - error

The fuel control module is not operating properly at idle.

Code P2188

The control module considered excessively high idle speed.

Code 2301

The primary circuit of the coil is closed.

2304: code

Short circuit of the coil control circuit to the on-board circuit.

P2307 - code

Short circuit on ignition coil 4 cylinders.

Code P2310

A similar problem, only with the control wiring of the 4th cylinder short circuit.

P2501 - code

Transmission control module - signal level too high.

ABC errors

ABS module failures are often associated with uneven wheel rotation or sensor failure. The control module is quite reliable and rarely fails.

Coolant temperature sensor errors

DTOZh usually issues code 4 in the machine’s self-diagnosis system. You can correct the situation by waiting until the engine cools down, or if the internal combustion engine is normal, you will need to replace the sensor.

Fuel level sensor errors

Problems arise only after unscrupulous repairs or when a hose was used to penetrate the gas tank. The module can be easily moved off the axis by outside interference.

Knock Sensor Errors

This sensor is located in a location subject to vibration and shaking. The sensor often fails for this reason. The system displays error 0326, which indicates a loss of signal from the device.

Camshaft sensor malfunctions

The problem is directly in the sensor or its wiring.

Phase sensor errors

The phase distribution system is complex and can malfunction due to damage to contact groups or wiring. If everything is fine with the car, look for the cause in the sensor.

Oxygen sensor errors

Oxygen sensors should be checked periodically. The parts are located on the exhaust system and are subject to oxidation, high temperatures, and road reagents. The cause of the malfunction is a break in the wiring, oxidation of the contact groups.

Speed ​​Sensor Errors

A typical P0500 breakdown indicates damage to the speed controller wiring. The line is checked for damage or oxidation of the terminals.

Brake sensor errors

P0504 is a standard brake system malfunction. The reason is wear of the contact group of the pressure sensor. The part is not repairable - it is replaced entirely.

Priora: electric power steering does not work, error light is on

The system is complex. If the on-board panel indicates a breakdown of the EUR, it is recommended to contact a specialist. Self-repair is rarely successful and brings the desired result.

Immobilizer errors

The unit often issues a 1600 fault, indicating a loss of communication with the module. The car may not start or operate incorrectly.

The malfunction is treated by diagnosing the control circuit.

Catalyst errors

The catalytic exhaust treatment system can only issue code 0422, which says that everything is working less efficiently than intended by design. This means that the catalyst is clogged.

The problem is eliminated by cleaning the device or completely replacing it.

APS - Priora errors

A typical breakdown with code 1570 indicates an incorrect response from the module to the ECU.

EEPROM errors

This is often related to system memory or on-board firmware. It is not recommended to repair the car yourself. This will require experience and special equipment.

ECU error codes

Associated with loss of power to the unit or its malfunction. If it’s enough to figure out code 0345 yourself, then other problems can be fixed in a specialized workshop.

Mass air flow sensor error

The system generates faults 0103 or 0102, indicating that the oxygen consumption is too high or low relative to the measured value.

Engine errors

It contains many faults. If there is damage to the internal combustion engine, the “Check Engine” lamp lights up on the dashboard.

Errors Lambda Probe

Another name for the element is an oxygen sensor. System breakdowns are caused by a violation of the wiring contact groups or its integrity.

Adsorber errors

The purge valve is a complex and capricious unit. The system usually displays fault 0441 due to incorrect air flow through the specified element.

Starter errors

There could be several problems here:

• wiring violation;
• retractor failure;
• brush wear;
• regulator relay failure.

Communication error with KSUD

The 8033 type problem is mainly related to the loss of connection to the module via the bus. As a repair, it is proposed to check the circuit for the presence of oxides of contact groups.

Errors: rich mixture: Priora - reasons

It is provoked by several reasons.

1. Incorrect throttle actuator adjustment.
2. The pump is supplying too much fuel. This may be caused by a short or increased voltage on the element.
3. A clogged air filter or incorrect data from the mass air flow sensor - the system transmits incorrect data to the computer.

Throttle faults

Problems are associated with clogging of the damper drive or excessive carbon deposits on it. The mechanism stops moving as expected and will need to be cleaned.

Brake pedal errors

A common code here is a failure of the pressure sensor. The part is easy to replace yourself, without the involvement of specialists.

Priora bus CAN errors

You will need a call and help from specialists. If the system has generated a problem via CAN, independent repair will not bring results.

Trouble with cold Priora 16 valves, no errors

It is recommended to look for the cause in a faulty ignition system. Usually problems are hidden in high-voltage wires and spark plugs.

Additional comments for troubleshooting P0030

Many high mileage vehicles (usually over 150,000 kilometers) have short-term problems with sensors, which usually occur when the engine is started or the transmission is subjected to prolonged stress. Often, if the Check Engine Light comes on but the vehicle continues to operate normally, the OBD-II system can be reset and the problem will be resolved. This is why it is important to check for an error code using a scanner and clear the code from the computer's memory before performing any repair work.

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On which cars is this problem most common?

The problem with code P0030 can occur on different machines, but there are always statistics on which brands this error occurs more often. Here is a list of some of them:

• Acura
• Audi (Audi a4, Audi q5)
• BMW (BMW X5, E90)
• Chery (Chery Tiggo, Fora)
• Chevrolet (Chevrolet Aveo, Captiva, Cruz, Lacetti, Malibu, Trailblazer)
• Citroen (Citroen Berlingo)
• Daewoo (Daewoo Matiz)
• Dodge
• Ford (Ford Mondeo, Fiesta, Focus, Fusion)
• Geely
• Honda
• Hyundai (Hyundai Solaris, Elantra)
• Kia (Kia Picanto, Rio, Sid, Spectra, Sportage, Cerato)
• Mazda (Mazda 3, Mazda 6, Mazda cx7)
• Mercedes
• Nissan (Nissan Pathfinder)
• Opel (Opel Antara, Astra, Vectra, Corsa)
• Peugeot (Peugeot 308, Partner)
• Porsche (Porsche Cayenne)
• Saturn
• Skoda (Skoda Octavia, Superb, Fabia)
• Subaru (Subaru Outback, Impreza, Legacy, Forester)
• Suzuki (Suzuki Grand Vitara)
• Toyota
• Volkswagen (Volkswagen Golf, Jetta, Passat, Polo Sedan, Touareg, Tiguan)
• Volvo (Volvo s80, xc90)
• VAZ 2107, 2112, 2113, 2114, 2115
• Lada Granta, Kalina, Niva, Priora
• UAZ Bukhanka, Patriot, 409

With fault code P0030, you can sometimes encounter other errors. The most common ones are: P0031, P0036, P0037, P0050, P0057, P0102, P0130, P0134, P0135, P0141, P0341, P0343, P2101, P2118, P2251, P2626.

Checking with a plug-in tester

More accurate and comprehensive diagnostics can be performed using a connected computer or a special tester. However, the data displayed on the screen is alphanumeric. The letters have the following meaning:

• P
  – errors in the operation of the electronic systems of the power unit;
• C
  – problems with the functioning of the chassis;
• B
  – electronic malfunctions in the cabin;
• U
  – joint system errors.

In addition, the number 0 means OBD code 2, numbers 1 and 2 indicate the enterprise code, and 3 is the backup password.

Basic ignition system

(the letter P precedes the digital designation):

• 0300
  – no spark in the cylinders of 16 valves;
• 0326
  – defect or short circuit in the knock indicator circuit;
• 0337
  – difference of the crankshaft controller to ground;
• 0343
  – high level in the headlight sensor circuit 0342 – a similar low indicator;
• 0422
  – signaling device malfunction;
• 0444, 0445
  – failure of the adsorber valve;
• 0480, 0481
  – problems with the fan assembly.

Fuel-air system

(the letter P is located before the numbers):

• 0030
  – open circuit between the oxygen indicator and the exhaust gas converter;
• 0116
  – problems with thermal control of the cooling fluid;
• 0102
  – error in the air flow control circuit;
• 0201, 0202, 0203, 0204
  – break in the injector wiring;
• 0217
  – overheating of the power unit;
• 0172
  – excess amount of air,
  0171
  – gasoline, in the fuel mixture;
• 0230
  – malfunction of the electric fuel pump;
• 0266 0269, 0270, 0272, 0274
  – problems with injector drivers.

In principle, diagnostics using BC makes it possible to identify the main faults. Basic error codes for Priora 8 and 16 valves using a plug-in tester provide significantly more information. To understand it, you should study the decoding of indicators, which is not so difficult.

Diagnostics

There are two ways to set error codes for VAZ 2114 injector 8 valves. However, each method has unique advantages and disadvantages.

Self-diagnosis of VAZ 2114: error codes and their interpretation

The self-diagnosis method does not require the driver to have complex instruments or additional units. To complete the procedure, the car itself is enough.

The standard sequence of actions looks like this.

If the sequence of actions is performed correctly, all indicators will light up and the display will show a two-digit fault code.

Note!

A failure signal may be a lack of response from the indicator. In this case, it is necessary to check the circuit coming from the device.

The most common error codes for the VAZ 2114 panel, occurring in 90% of cases:

In some cases, errors may be superimposed on each other if the failure is similar. For example, if errors 1 and 4 intersect, the panel will indicate "5".

It is important to know that after viewing, VAZ 2114/2115 error codes do not disappear on their own after repairs are performed. They need to be forced reset. To complete the work you will need a simple sequence of actions:

This also needs to be done if you are planning a trip to a service station. Having discovered the instructions from the on-board computer, the technicians will correct these problems, which will definitely be more expensive.

The disadvantages of an independent procedure include the low accuracy of the data. On-board diagnostics only show the general direction vector where the fault should be looked for.

Check using diagnostic equipment

You can identify error codes for VAZ 2115 and 2114 using a laptop with a special program. The tool is connected to the vehicle's test socket through a set of adapters. The wizard configures the software, and after diagnostics, one or more faults will be displayed on the computer screen in the form of a five-digit code.

The first part is the letter:

The second part is a single digit:

The next element is the breakdown group indicator:

The final two numbers point directly to the problem itself.

Spark plugs, BB wires, coil

If a VAZ-2114 car stalls, the “check” is on, or the engine “troubles” at idle, you need to pay attention to the ignition system. The main elements are spark plugs and high-voltage wires. Often on domestic cars there is a breakdown of spark plugs or wires. It is necessary to check these elements for serviceability and replace if necessary. The best way to check is to install a pre-made set of spark plugs or wires.

This way we can narrow down our search. If even one spark plug is faulty, it is better to replace the entire set. Otherwise, there is a high probability that the breakdown will happen again, only on a different cylinder. It is also recommended to check the spark plug gap between the central and side electrodes. Over time, this gap increases. The normal value should not exceed 1.3 millimeters. If the gap is larger, it can be corrected by bending the side electrode closer to the central one. If the distance between the electrodes is too large, a spark is difficult to form. Part of the fuel mixture will simply go into the air. Typically, the service life of spark plugs is 20 thousand kilometers. Some people install iridium ones because they last longer. But as motorists say, there is no point in overpaying. The characteristics of the internal combustion engine will remain the same, and the cost of such spark plugs is equivalent to three or four sets of regular ones, which are no worse.

Less often on a VAZ, the ignition coil itself fails. At the same time, the “check engine” lamp lights up on the instrument panel. The engine may stall, start poorly, or stall. The coil cannot be repaired and must be replaced completely with a new one. As for the wires, you can check them by measuring the resistance.

Recommendations for checking and troubleshooting

The first thing you should check when misfiring is the explosive wires and ignition coils (module), they often turn out to have broken insulation, a break, or an oily surface. We measure the wires with a multimeter (normal resistance is about 4 - 10 kOhm), in resistance mode, but to check individual ignition coils, you just need to swap places with a known working cylinder and clear the errors again. If the code has changed to the number of another cylinder, then the coil is faulty. The ignition module is more complicated; it needs to be checked with a tester.

Code meanings for self-diagnosis

Using the on-board computer, the driver can determine the following faults:

• Code “ 2
  ” – excessive voltage in the on-board network. To eliminate it, you need to check the main electrical circuits;
• The number “ 3
  ” indicates a malfunction of the fuel control indicator;
• «4
  » – problems with the refrigerant temperature sensor;
• The number “ 5
  ” means incorrect operation of the environmental indicator;
• Code “ 6
  ” means engine overheating;
• «7
  » – critical lubricant pressure;
• The number “ 8
  ” indicates a malfunction in the brake system;
• «9
  » – signals that the battery is low;
• The " E
  " symbol indicates a problem with the packet data.

It is worth noting that if the BC options switch key is inactive for more than 10 seconds, the instrument panel will return to normal operation.

Error codes for VAZ 2114 and VAZ 2115 with interpretation

The Russian automaker VAZ produces a sufficient range of cars. Brand models are in great demand among domestic car enthusiasts and in the CIS countries. The popularity is due to the moderate cost and cheap repair of cars. However, problems happen with any vehicle and the plant’s products are no exception. Error codes for the VAZ 2114 injector can guide the motorist regarding the area of ​​the breakdown and help in troubleshooting the problems.