Error P0507 - what it means, symptoms, causes, diagnosis, solution

What does code P0507 mean?

Trouble code P0507 is triggered when the engine idle speed is higher than expected. All modern engines have a desired idle speed - usually between 600-1000 rpm.

The control unit uses position sensing and throttle adjustment to achieve these speeds. If the idle speed exceeds these set values ​​and the maximum adjustment zone, the control unit will generate this error code.

Code P0507 is a common code for vehicles equipped with Electronic Throttle (E-Gas). Newer vehicles usually use E-gas.

The throttle valve is only called electronic. It replaces the old throttle body with a cable between the gas pedal and the throttle body.

The electronic throttle body uses sensors on the gas pedal and an electric motor in the throttle body to provide the desired acceleration. But this does not mean that this error code must necessarily be related to a faulty throttle valve. It can also have many other causes.

Diagnostics with a scanner

The information in this section is quite extensive, since there are many types of scanners.

The basic principle of their operation is that all data, including errors, is transmitted from the ECU to a special diagnostic connector, which in a Chevrolet Niva is located on the driver's side under the steering wheel.

The scanner's job is to read and decode these messages.

Note that there are dealer scanners, that is, those that are designed for a given car. For Chevrolet Niva this is BC State.

It is inserted into the panel instead of the signaling device, and the information loop is prepared from the factory.

Universal scanners should be connected to the diagnostic connector. The most popular scanners today are models that allow you to transmit information via Bluetooth.

To do this, you need to install the appropriate application on your smartphone, for example, OpenDiag, and connect it to the scanner.

The program interface allows you not only to read the parameters, but also to manage some of them. You can also reset all errors from your smartphone. There are scanners with their own display. All error information in the form of codes is displayed on this display.

Symptoms of P0507

The most common symptom of a P0507 code is that you will notice that the idle speed is higher than normal. You will also likely see a check engine light.

There may be other symptoms such as misfire, rough idling and acceleration if the cause of P0507 is a lean/rich mixture.

• High idle speed.
• Rough idle.
• RPM jumps XX.
• Check Engine.
• Uneven acceleration.

How to Diagnose Code P0507

This diagnostic method is used by the most professional auto mechanics. Some tools may be required to complete these tasks.

Always connect the car charger before using the OBD2 scanner and other diagnostic tools. Low voltage can damage control units and lead to errors.

A couple of weeks ago, when driving on a well-warmed engine, the speed began to freeze, then dropped to normal, and it appeared unpredictably at any moment. Error 0507 appeared on my computer. The worst thing is that when the problem is not permanent, it would have been better if it had broken completely...

Full size One fine moment, at an intersection, while letting off the gas, the car stalled, started it up and drove off. A couple of days later, the same thing happened, only the car wouldn’t start, I pressed the gas pedal and started it, released the pedal, and it stalled again. I started it again, revved it up, it seemed to work, but the idle was too low. I got home, parked the car, wanted to go during the day, but the car wouldn’t start, it just starts with the gas pedal and stalls. Well, in general, everything is clear, the problem is most likely with the idle air regulator. Before getting into the throttle assembly, I decided to read what people write, there is a lot of information, but essentially little, but I managed to extract something from this pile of information. 1. I went to the official and bought there - Idle air control 2123 - 900 rubles. — Damper position sensor 2123 — 350 rub. — Gasket of the throttle body pipe 2123 50 rub.

Full size I have long realized that there are a lot of defects in stores, I came across some articles in which it is written that replacing the idle speed control did not change anything, it was just not working, people advised to remove it from the working car for a test. 2. Checking the system for leaks, I came across a comment on how to easily check the entire system for vacuum tightness, because Due to air leaks into the intake system, similar symptoms may occur. In general, we start the engine, unscrew the pipe clamp, after the MAF (Mass Air Flow Sensor), quickly pull it off and plug it with the palm of the hand, the engine stalls, the palm is sucked in, we hold our hand and wait, if the system is not sealed, the palm will immediately release in case of a major leak , in a particular case, you can hear where the air is leaking into the system. In my case, my hand was suctioned and the vacuum held for 30 seconds, then I removed my hand myself - the system is sealed.

I removed the throttle assembly, removed the tubes and connectors to the sensors there, but did not disconnect only the heating tubes of the assembly. The first thing that caught my eye was the absence of a plastic pipe in its place in the nozzle of the unit, which was found inside the receiver, somehow I pulled it back out, it’s not entirely clear why it is needed there at all. (By the way, I forgot to put it back, I had to take everything apart again)

I began to unscrew the idle speed control and was surprised that the fastening screws were not tightened. I wiped all parts of the throttle assembly, it was generally not very dirty... I removed the remnants of the old gasket. Installed a new valve. Replaced the throttle position sensor. I put everything back together, started it, the car started, gave it gas and the revs froze again, got upset, decided to drive a little, warm up the engine, it didn’t help, the revs froze and then dropped. I checked the system again for vacuum, everything was fine, I decided to reset the terminal from the battery just in case, waited a minute, put the terminal on and started the engine, revved it up, the revs dropped as expected, drove for 4 kilometers, everything was fine.

Upd: 09/05/17 On the advice of the Drayvovites, I removed the acoustic pipe, I didn’t notice much of a difference, we’ll assume that it was an extra detail... By the way, there was a good dent on one side of the pipe, the origin of which is unknown...

The P0507 error code reads as “IAC control system speed is higher than expected.” Often, in programs that work with an OBD-2 scanner, the name may have the English spelling “Idle Air Control (IAC) System RPM Higher Than Expected.”

Self-diagnosis

In a car, the operation of the entire electronics system is monitored by a control unit (ECU). In order for the driver to recognize operational failures in time and localize them, cars leave the assembly line with an already built-in diagnostic system. It is located on the front panel. With its help, the system itself detects failures in electronic devices and notifies about them, generating errors with digital codes or their combinations. In this way, the car self-diagnosis occurs. To be able to decipher error codes, special tables have been compiled. In this case, self-diagnosis is carried out on the instrument panel, and not on the computer.

To check, you need to reset the daily mileage data on the wheel revolution meter (odometer), then activate the ignition (position 1).

On all touch devices, the arrows will move twice to the highest readings.

By pressing the odometer button again, messages are received about the installed version of the operating system. The next time you press the button, an indication of problems, if any, is displayed.

What errors may appear during self-diagnosis of the control panel, and how to decipher them

0 - indicates that there are no problems in the electrical wiring, apparently the fault is mechanical;

1 - indicates a malfunction of the ignition system microprocessor;

2 - no signal is detected coming from the circuit leading to the fuel level sensor. Reason: open circuit, plaque formation due to oxidation of contacts or short circuit;

4—signal of increased voltage in the on-board network (more than 16 V). It is necessary to check the battery and generator;

8—opposite signal, the voltage is too low (less than 8 V) due to a low battery or problems with the generator.

If there is not one malfunction, but a group, then an error is displayed on the dashboard, the code of which consists of several digits resulting from the summation of errors. So, for example, the issued error code 10 indicates errors 2 and 8, 6 – the sum of 2 and 4, 12 – 4 and 8, 14 – 2,4 and 8.

12 - a malfunction in the circuit leading to the malfunction indicator lamp, possibly due to damage to the connector contacts or their oxidation, or the indicator itself is faulty;

13 - no data is received from the oxygen concentration sensor device (ƛ-probe). The sensor or the wiring leading to it may be faulty;

14—the coolant temperature in the cooling system is higher than normal. Reasons: sensor failure, low fluid level in the radiator, faulty thermostat;

15 - coolant temperature is below normal. Reasons: a failed thermostat, air entering the system due to a coolant leak;

16 - the voltage in the on-board network is too high;

17 - the voltage in the on-board network is too low;

19 - malfunction in the wiring of the PCV sensor. Reasons: oxidation or contamination of contacts, broken wiring, short circuit, mechanical failure of the wheel;

21-22 - error in the position of the remote sensing sensor, due to a failure of the electronic part, due to a breakdown of the movable core or due to the fact that the coating on the slider has been worn off;

23-25 ​​- deviation from the norm of the intake air temperature sensor. Possible reasons: clogged sensor element, oxidation of contacts, open circuit, short circuit;

24 - the speedometer does not provide reliable data on the vehicle speed. Reasons: the speedometer has mechanical damage, there is contact in the terminal connections, the sensor is faulty, there is a break or a short circuit in the wiring, the computer is malfunctioning;

27-28 - warning about a violation of the level of exhaust gases for one of the reasons: damage to the wiring, the catalytic converter has become unusable, the muffler and muffler suspension are damaged;

33-34 - error code for mass air flow data. Causes: high voltage in the wiring going to the sensor device, interference affecting the impulse from close proximity of wires or sensor to devices with high voltage (generator, ignition wires, etc.), wear of vacuum and air intake hoses;

35 - malfunctions occur when the engine is idling; they can occur due to a malfunction of the hydraulic compensators in the valve mechanism drive, a malfunction of the TPS, or due to unaccounted for air leaks;

41 - pulse error from the camshaft sensor rarely occurs. Cause: damage to the wiring or malfunction of the sensor itself;

42 - malfunction of the ignition system. Reasons: breakdown of the ignition coil or high-voltage electrical wiring, and possibly incorrect spark plug gap setting;

43 - lack of signal from the detonation sensor device. Reasons: sensor failure, contact oxidation or wiring fault;

44-45 - the stoichiometric combustible mixture is incorrectly formed. Causes: incorrect air/fuel ratio, faulty throttle sensor or oxygen sensor;

49 - the on-board computer registers a loss of vacuum for one of the reasons: loss of tightness of the pipeline or working chambers of the amplifier, failure of the check valve;

51 - an error in the operation of the ROM requires checking the connector, injector harness and all wiring, as well as the ground of the control unit;

52 - there is a problem with the operation of the random access memory, it is necessary to diagnose the microprocessor;

53 - there is no signal from the exhaust gas controller;

54 - the octane corrector controller does not respond, it is either de-energized or faulty;

55 - high engine load. Reasons: damage to the power circuit, violation of the cooling mode of the unit, load on the shaft due to worn bearings, sudden changes in voltage in the wiring;

61 - distorted oxygen sensor data. Causes: sensor malfunction, unreliable connection of the contacts of the controller, sensor and ignition system harness or damage to the harness;

Self-diagnosis does not always accurately display breakdowns. The error code can only indicate the section of the electrical wiring where the malfunction occurred. There may also be software glitches that may cause errors to not always be displayed correctly. To obtain more accurate diagnostic data, you should use external devices (diagnostic scanners, computer diagnostics).

Technical description and explanation of error P0507

OBD II trouble code P0507 is defined as "Idle Air Control (IAC) speed higher than expected." Set when the powertrain control module (PCM) is unable to maintain or control engine idle speed.

In most cases, the PCM will attempt to make adjustments to various systems such as fuel timing, ignition timing, injection pulse timing, and others. Trying to maintain a given idle speed. However, when this limit is reached, the PCM will set code P0507 and turn on the warning light.

Idle speed in gasoline engines is adjusted and controlled by the idle air control valve, which is usually located on the throttle body. The valve is driven by a stepper motor, which receives commands from the PCM based on information received from various sensors located on the engine.

As long as the throttle valve remains closed, idle speed and quality are controlled by the PCM through the idle air control valve.

For example, if the engine is started in sub-zero temperatures, the PCM commands the valve to allow less air to enter the engine. This allows you to enrich the fuel-air mixture and creates conditions for regulating idle speed in cold weather.

As the engine warms up and combustion becomes easier and more complete. The PCM commands the idle air control valve to increase the amount of air entering the engine in response to changing conditions.

If the load on the engine changes, for example, when some electrical consumers are turned on or off. The PCM adapts the signal voltage to the idle air control valve. To ensure that the idle speed remains stable and at the RPM specified by the manufacturer.

Note that the idle air control valve is closed by the PCM when the throttle valve is opened. This is done in order to prevent excess air from entering the engine.

The most popular Niva 21214 errors and methods for eliminating them.

Engine error codes (P0000)

Note!

Chevrolet Niva on-board computer errors found in this way reflect the most accurate state of affairs at the current time.

• 0102/103 - the pulse from the mass air flow sensor is too low or high, damage to the device or its wiring may occur;
• 0112-0113 – similar indicators from the device for measuring the actual temperature of the intake manifold;
• 0116 – the level of the DTOZh signal is outside the permissible limits, urgent diagnostics of the system is required;
• 0117/0118 – is responsible for the above element and indicates that the signal level is too low/high; it is also necessary to check the sensor itself;
• 0122/0213 – excessively weak or strong impulse from the TPS, cleaning the mechanical part of the device or replacing the sensor may help;
• 0130-0132 – incorrect data transmission from DC1 installed to the catalytic converter; the part may need to be replaced or cleaned;
• 0133 – is responsible for the above element and indicates a slow response of the device to driver commands;
• 0134/0135 – breakage of the power line/breakage of the heater DK1;
• 0136 – short circuit with contact to the negative wire of DK2;
• 0137/138 – critical drawdown/exceeding the permissible norm of the signal from the oxygen sensor installed after the exhaust gas converter;
• 0140/0141 – open circuit of the wiring or breakdown of the DC2 itself;
• 0171/0172 – malfunction of the fuel supply device; the mixture is excessively lean or rich; it is necessary to check the fuel lines for damage; the fuel pump and its relay should also be diagnosed;
• 0201-204 – damage to the injector driver control wiring for each engine cylinder in series;
• 0261/0264/0267/0270 – short circuit on the body for wiring the driver of each injector in series;
• 0262/0265/0268/0271 – similar, only with a touch to the vehicle’s on-board wiring, for each cylinder, respectively;
• 0300 – the electronic control unit has detected multiple misfires, the gasoline supply is turned off;
• 0301-0304 – similarly, misfires are observed for each working chamber, respectively, the controller cuts off the flow of fuel to the damaged module;
• 0327-0328 – the knock sensor is not working correctly, a weak or too high signal is detected;
• 0335 – DPKV is out of order or its wiring is damaged, you should immediately perform physical diagnostics of the sensor;
• 0336 – the same sensor does not work correctly;
• 0337/0338 – short circuit to the body/break in the DPKV wiring;
• 0340 - therefore, error p0340 Niva shows that there are problems in the circuit of the above sensor;
• 0342 – critical reduction in the permissible impulse from the DPKV;
• 0343 - error 0343 Niva warns that the actual impulse from the DPKV is above the permissible limit;
• 0422 – obstruction of the catalytic converter has been detected, the device needs to be replaced;
• 0441 – the actual value of the flow meter differs from the calculated values;
• 0443 – the canister purge valve is faulty or there is serious damage to the power cables;
• 0480/481 – failure or damage to the wiring of the fan relay No. 1/2 of the cooling system;
• 0500 – the speedometer sensor shows incorrect data;
• 0503 – DSA pulse is interrupted or the wiring is short-circuited;
• 0506/507 – the power plant XX regulator is blocked, a low or high speed level is detected;
• 0560 – the performance of on-board systems is limited due to a critical voltage drop, usually the cause is a deep discharge of the battery;
• 0562/563 – there are voltage surges in the on-board network, up or down from the reference value;
• 0601 – error in writing or reading information for a permanent recording device;
• 0603/604 – similar for RAM;
• 0615 – there is no power to the starter relay, you need to check the safety insert and wiring;
• 0616/617 – Short circuit on the on-board network or on the car body of the starter relay wiring;
• 1135 – interruption or incorrect operation of the control wiring DK1;
• 1140 – mass air flow sensor error, the measured value differs from the calculated value;
• 1141 – disruption of the operation of power lines DK2;
• 1386 – incorrect signal from the mixture detonation channel length sensor;
• 1410 – Short circuit of the canister purge valve lines with contact with other wires;
• 1425 – similar, only with contact on the car body;
• 1426 – complete break in the lines of the canister purge valve – no pulse;
• 1501/02 – there is a short circuit in the control and power lines of the main fuel pump touching the standard wiring or body, respectively;
• 1509 – critical overload of the power plant idle speed control relay;
• 1513/514 – short circuit of the above module with contact to the wires or car body;
• 1541 – control of the electric fuel pump is lost, there is a break in the cables;
• 1570 – APS does not respond, control elements or control lines may be damaged;
• 1602 – error 1602 Niva indicates that there is no power in the controller;
• 1606 – the rough road sensor is acting up;
• 1616/617 – too weak or strong impulse from DND;
• 1640 – error in writing or reading the EEPROM system;
• 1689 – false data in the error memory, the system needs to be reset;
• 2188 - error 2188 Niva warns the user that an excessively rich fuel mixture is supplied to the engine at idle speed (the engine choke).

Symptoms of malfunction

The main driver symptom of P0507 is the MIL (Malfunction Indicator Light). It is also called Check engine or simply “check light”.

They can also appear as:

1. The “Check engine” warning light on the control panel will light up (the code will be stored in memory as a malfunction).
2. Floating speed, as well as attempts to stall at idle.
3. Idle speed is higher or lower than normal.
4. The engine may stall if the idle speed is not maintained by pressing the accelerator pedal.

Depending on the symptoms, the severity of a P0507 code can range from moderate to severe. Therefore, it is recommended to resolve this issue as soon as possible.

Decoding codes

Now we suggest that you familiarize yourself with the decoding of the combinations. Why errors may occur and how to eliminate them can only be found out as a result of diagnostics.

The elm327 channel published a video showing the diagnostic procedure for a Chevrolet Niva using a special adapter and an Android-based mobile phone.

Common mistakes

First, let's look at deciphering frequently occurring problems that occur in the Chevrolet Aveo in the back of the T250, T300, Niva and other models.

Engine

Let's consider the malfunctions encountered in the operation of power units.

How to Troubleshoot or Reset Trouble Code P0507

Some suggested steps to troubleshoot and fix error code P0507:

1. Read all data and stored error codes using an OBD-II scanner.
2. Clear the codes and check if the P0507 code appears again.
3. Observe the engine's operation at idle speed, with the gear engaged and disengaged. To check whether the engine idle speed corresponds to the values ​​​​specified in the manufacturer's technical documentation.
4. Check the engine for vacuum leaks.
5. Inspect the throttle body for carbon buildup. And also on the body and inlet of the idle air bypass control valve.
6. Disconnect and check the idle air control valve.
7. Check if the idle air control valve passages are clogged.

Computer diagnostics

The most complete diagnosis is possible with a computer or laptop. In order to use this method, you must purchase an adapter. This adapter performs two functions at once. It is an adapter from a K-line port to a USB port or to a COM port. It also acts as a decoder, which allows you to transmit signals from the ECU to the PC. You will also need to install the appropriate software on your laptop. There are a lot of free versions on the Internet. There are universal programs, as well as programs written for a specific car. After connecting to the computer, you will need to turn on the ignition and launch the program. The connection will happen automatically.

The interface of the computer program is very convenient and allows even an inexperienced user to navigate intuitively. All functionality can be divided into several sections. These are parameters, errors and settings. If the first two sections are informational, then using the third section you can control the vehicle systems.

All modern cars allow you to determine a malfunction in the operation of certain systems and units using combinations of errors. Their identification is carried out using diagnostics. In this article, we will look at what Chevrolet Niva error codes are used to report breakdowns.

How to do it yourself?

Diagnostic devices

Resetting errors on Chevrolet

Video “How to check a Niva Chevrolet car before buying?”

Comments and Reviews

Diagnosis and problem solving

Connect the scanner, read and write down all available codes. This information may be useful if an intermittent fault is later diagnosed.

If other codes are present along with P0507, diagnose and resolve them in the order in which they were stored. The most likely additional codes are usually related to the vacuum system.

Therefore, check the vacuum system for leaks caused by damaged vacuum lines. If necessary, repair and clear all codes before operating the vehicle. Then, retest the system to see if any codes are returned.

Throttle valve

If the code persists, remove the throttle body from the intake tract and inspect it for excessive carbon deposit buildup. In some cases, it may be possible to remove light carbon deposits from the throttle body and auxiliary air passages using approved cleaners.

However, heavy deposits usually cannot be removed without damaging the throttle body or idle air control valve. In these cases, the best option is to replace the throttle body or idle air control valve with original parts.

When installing cleaned or replaced parts, ensure that all seals and gaskets are also replaced to prevent vacuum leaks. Double check all vacuum line connections before starting the engine or operating the vehicle.

Checking wires and connections

If the P0507 code persists, perform a thorough visual inspection of all associated wiring. Look for damaged, burnt, shorted or corroded wires and connectors.

Once no visible damage is found, check resistance, ground, and reference voltage. Compare all readings obtained with the data specified in the manual. Replace wiring as necessary to ensure all readings are within manufacturer specifications.

Stepper motor and idle control valve

Check the actual signal voltage that reaches the stepper motor at the connector. Using a scanner, command the idle air control valve to open. Compare the obtained value with the values ​​specified in the manual.

Special diagnostic programs usually produce a voltage range that corresponds to the degree of opening of the idle air valve. And sometimes the degrees of rotation of the stepper motor.

These readings must correspond exactly to the stated values, otherwise the harness must be replaced. If all readings obtained are consistent with the stated values, the stepper motor is faulty and must be replaced.

These steps should solve the problem with error P0507. But if it still appears again, then perhaps the problem is periodic. In such a case, diagnosis can be challenging. And sometimes it is necessary to give the malfunction a chance to worsen in order to understand exactly where the problem is.

Chevrolet Niva error reset

The standard procedure for resetting the controller occurs only after all faults have been completely corrected, otherwise annoying encryption will appear again. The procedure is performed in two available ways.

1. Disconnect the battery from the on-board network for 10-15 minutes. The controller will completely reboot and return to factory default settings.
2. In the BC menu, enter the “errors” service, press the daily mileage reset button and wait for the sound signal from the car, and horizontal lines should appear on the display.

On which cars is this problem most common?

The problem with code P0507 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:

• Audi (Audi a4)
• Chery (Chery Amulet, Tiggo, Fora)
• Chevrolet (Chevrolet Aveo, Cruz, Optra, Tahoe)
• Chrysler (Chrysler 300c)
• Daewoo
• Dodge (Dodge Caliber)
• Ford (Ford Focus)
• Geely
• GMC Sierra
• Honda (Honda Accord, SRV)
• Hyundai (Hyundai Accent, Getz, Santa Fe, Sonata, Tucson, Elantra)
• Infiniti (Infiniti fx35)
• Isuzu (Isuzu Trooper)
• Jeep (Jeep Grand Cherokee)
• Kia (Kia Magentis, Sorento, Spectra, Sportage)
• Lifan (Lifan Solano)
• Mazda (Mazda 3, Mazda 6)
• Mercedes (Mercedes e210)
• Mitsubishi (Mitsubishi Galant, Montero)
• Nissan (Nissan Hell, Altima)
• Opel
• Pontiac (Pontiac Sunfire, Grand Prix GXP)
• Saturn (Saturn SC)
• Skoda (Skoda Octavia)
• Subaru
• Volkswagen (Volkswagen Passat, Touareg)
• VAZ 2107, 2110, 2112, 2114, 2115
• Gazelle ZMZ 405
• Lada Kalina, Niva, Priora

With fault code P0507, you can sometimes encounter other errors. The most common ones are: P0068, P0106, P0118, P0171, P0174, P0300, P0301, P0420, P0505, P0506, P1125, P1515, P1295, P2279.

Trouble P0507 is a general trouble code that indicates there is a problem with the idle speed control system. DTCs P0505 and P0506 may also appear along with this code.

Checking using a connected computer or tester

Driver Information Panel

Checking system malfunctions using connected devices gives more accurate results, but at the same time requires deciphering special codes. For example, the monitor displays code p0441 or p0130 or error p0422. Oh, these car manufacturers, in human language they could write “replace the oxygen sensor” instead of P0130 or “check the canister valve” instead of P0441. But nothing can be done, the Lada Priora is also intended for export, so it is easier to write p0441 in the program than to give explanations in Russian, Kazakh, Arabic, Armenian and 10 other languages. And then attach special tables that indicate the meaning of certain codes. Just look at them and everything will become clear. But these tables are not included with the operating instructions. Either way, you can check them out below.

The Latin letter comes first:

• P - error in the electronic systems of the motor;
• C - error in the electronic systems of the chassis;
• B - error in interior electronics;
• U is an error in the joint operation of different systems.

Next comes the number:

• 0 - OBD-2 code;
• 1 - enterprise code;
• 2 - enterprise code;
• 3 - reserve code.

The system indicates an error

The next digit indicates the system in which the malfunction was found:

• 0 — exhaust;
• 1, 2 — fuel and air supply system;
• 3 - ignition;
• 4 - additional control;
• 5 — idle system;
• 6 - ESC;
• 7, 8 - transmission.

The last 2 digits indicate the serial number of the fault.

How does a mechanic diagnose a P0507 trouble code?

When diagnosing this error code, a mechanic will do the following:

• Reads all stored error codes using an OBD-II scanner.
• Review all saved data and clear error codes.
• Will test drive the car to make sure there is a problem.
• Check the vacuum wires for damage and also check for intake air leaks.
• Check the throttle body for large amounts of carbon buildup and the throttle body for proper opening and closing.
• Determines the engine idle speed when checking the idle air control valve and oil pressure switch in the power steering system using a diagnostic tool.
• Check the battery charging system.

VAZ error table

1. On a car with the engine turned off, disconnect the connector with contacts from the controller. Then you need to turn on the ignition, but do not start the power unit. You will need a multimeter to check the voltage between the contact elements.
2. The sensor connector is equipped with five pins, counting from left to right when viewed from the side of the air flow from the filter. Between contacts 2 and 3, the nominal voltage should be 10 volts, between 3 and 4 - 5 V. If there are deviations, the user needs to diagnose the integrity of the electrical circuit for breaks and current leakage.
3. At normal values, the ignition is turned off and the resistance between the “ground” and the fifth pin number is checked. The resulting parameter should be about 4-6 kOhm. If the value obtained is 0 Ohm, the sensor must be replaced; the problem may also be a short to ground. If the resistance parameter is 100 kOhm, then the cause must be sought in a break in the power supply circuit or in the engine control unit.

• regular use of low-quality fuel;
• violation of air intake tightness;
• lack of spark;
• damage or physical wear of cylindrical devices.

If replacing the fuel does not help, it is necessary to diagnose the air intake system. It is necessary to tighten the fastening clamps, change the air filter element and check the pressure in the rail (the normalized indicator is no more than 2.8 atm). It is also necessary to perform diagnostics:

• high-voltage wires connected to the defective cylinder;
• spark plugs;
• check for possible oxidation at the cable connection points.

Diagnostics of high-voltage wires is carried out using a tester; it is necessary to check the resistance. If the obtained value is more than 10 kOhm, then the cables must be replaced. You also need to check the integrity of the spark plugs and make sure that there is no carbon deposits on their tips. If the described actions did not help determine the cause, the cylinders are diagnosed. The user needs to check the compression level, which should be approximately the same in each device. If the obtained values ​​differ by more than 0.5 atm, then the power unit needs to be tested in more detail.