Trouble Code P2020 – Intake Manifold Variable Actuator Position Sensor/Switch/Switch Circuit Performance Range (Bank 2)

Car self-diagnosis

It should be noted right away that diagnostics on your own and at a service station are slightly different things. A specialized service has the necessary equipment that will allow you to fully identify all existing errors in the operation of your vehicle’s on-board computer.

VAZ 2114 car

Self-diagnosis is also a useful thing, but it is unlikely that you will be able to fully detect all errors if you check it yourself. It is also worth noting that the fault codes in both cases will be different, so we will consider both options separately. So, how is the dashboard diagnosed to identify faults without the participation of the on-board computer? This method is not known to all VAZ 2114 owners, but we will tell you about it.

1. Sit in the driver's seat and hold down the odometer button.
2. After this, turn the ignition key to the first position.
3. Then release the odometer button: you will see the arrows begin to move.
4. Press the button again and release it, so you will see the firmware version.
5. Finally, press and release the button a third time and if there is a fault, you will see an error code on the screen.

Unlike diagnostics using specialized equipment, in our case you will only be able to see two-digit fault codes, not four-digit ones. Let's look at the most common failures found in VAZ cars.

Laptop for vehicle diagnostics
It is necessary to take into account the fact that errors can add up, that is, if you have malfunctions with codes 1 and 4, then the number 5 will appear on the screen. It should also be noted that all malfunctions will be stored in memory until until they are reset manually. To do this, with the ignition on, disconnect the terminals from the battery and wait a few seconds, then connect them back. This way, errors will be reset manually and you won’t have to pay your hard-earned money to specialists.

Diagnostics using special equipment

1. Diagnostic connector

2. Connecting a wire with an adapter to the diagnostic socket

3. Connecting the wire to the computer

4. Running software for testing

The diagnostic process using special equipment consists of checking the car using a laptop. To connect to the diagnostic connector you will need a cable with an adapter. Using this cable, we connect the computer to the connector via USB output. For testing you will also need software; the power of the computer used is not important. There are many versions of different testing programs on the Internet.

Diagnostics is performed as follows:

1. It is recommended to inspect the vehicle before starting the inspection. Check the volume of consumables - engine oil, brake fluid, coolant.
2. Find the diagnostic connector and connect your laptop to it. If you have a special scanner, then that's even better. But since finding a scanner is not so easy, and buying one is not cheap, you can use a laptop. Before testing can begin, the ignition must be activated. There is no need to start the power unit.
3. After connection, the testing utility starts. The software interface may vary. When you launch the software, graphs or a list of parameters with numbers may appear. This information will allow you to draw conclusions about the operation of the power unit.
4. The scan starts. Fault codes will appear on the laptop screen. To decrypt, use the information provided in this article. We could not describe all the codes, but we deciphered those that occur most often. Usually, when downloading a program to a computer, users are provided with a separate file describing the faults.
5. After decryption, the problem is repaired.

Decoding codes

Next, we will look at the most common codes encountered during diagnostics of on-board computers of VAZ 2114 cars. Of course, on-board computers are also electronics, and they can cause certain failures, such is the specificity of their operation. However, often the fault codes displayed by the on-board computer are still true.

Description of the error

We will not consider all codes without exception, but especially for our readers we have selected errors that occur most often when diagnosing VAZs.

Reasons for error P2020

The most common causes of error P2020 are:

• Malfunction of the solenoid valve of the intake manifold geometry changing system
• Malfunction of the sensor or switch of the damper position of the system for changing the geometry of the intake manifold (bank 2)
• Clogged or damaged valve of the intake manifold geometry changing system (bank 2)
• Short circuit or broken electrical wires or damaged electrical connectors
• In rare cases, a faulty engine control module (ECM)

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Other combinations

The errors described above are not the only ones. And in practice you can find a large number of different codes:

These are the most basic error codes. More detailed information can be found in the file that usually comes with the diagnostic program. All identified defects must be repaired. After which the errors are reset and a recheck is performed.

Self-diagnosis at service stations and in garages

Diagnostics can be performed without the involvement of specialists or as a result of contacting a service station. In this case, the driver will have to be content with different results.

This is explained by the fact that car services use a whole range of equipment that allows you to determine the full list of error codes BK of a VAZ 2114 car. Practice shows that self-diagnosis allows you to achieve a certain result, but, unfortunately, it is possible to find all errors in exceptional cases.

How to decipher error codes during self-diagnosis of VAZ 2114?

When contacting a car service center and performing work on their own, the driver will see different error codes. For this reason, both options need to be considered.

Not every car owner operating a VAZ-2114 knows that it is possible to diagnose problems without using a BC. To use this technique you will need to do the following:

• take the driver's seat and hold down the odometer button;
• The ignition key must be set to the first position;
• You can now release the odometer button. The arrows on the instrument panel will begin to move;
• Pressing and releasing the odometer button again will display the firmware version;
• the next pressing and releasing the button will allow you to see codes that will indicate malfunctions in the operation of the vehicle systems.

Since the diagnostic process does not use special devices and equipment, codes are issued by the system in a 2-digit format. Let's look at the errors of the VAZ 2114, the explanation of which is presented in the table (below in the text).

The table also provides a description of problems and malfunctions.

For example, code 13 indicates that there is no signal from the oxygen sensor. 17 informs the driver about low voltage in the on-board network, and 24 - failure of the vehicle speed sensor. Codes No. 51 and 52 indicate problems with the permanent and random access memory device.

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DIAGNOSE YOUR CAR YOURSELF!

the engine is running; self-diagnosis of the injector driver has determined that there is no load on one or more outputs. The CHECK ENGINE lamp lights up immediately after a malfunction occurs.

1. Check the resistance between the contacts of the injector harness block.

2. Check the resistance of the circuit between the controller harness block and the injector harness block.

3. Check the resistance of the injector of the idle cylinder.

HOW TO CHECK:

Connect the adapter cable to the diagnostic connector. Turn on the ignition, start the engine. Select "Errors" from the menu.

The fault code may not be active at this time. Code P0202 is intermittent. If there are no other codes, analyze the conditions for the occurrence of the code. The MP7.0N controller uses an injector driver with a self-diagnosis function. It can detect the presence of faults such as an open, short to ground or power supply in the injector control circuits.

1. Stop the engine. Disconnect the injector harness connector. Using a multimeter, check the resistance between terminals “E” and “B” of the injector harness block.

The resistance should be within 11..15 Ohms.

2. Disconnect the harness connector from the controller. Using a multimeter, check the resistance of the injector control circuit of the idle cylinder between the controller harness block and the injector harness block.

Resistance less than 1 ohm indicates a loose connection or a faulty controller.

Resistance greater than 1 ohm indicates a wire break between the controller harness block and the injector harness block.

3. If the resistance went beyond 11..15 Ohms, disconnect the wires from the injector of the idle cylinder. Check the injector resistance with a multimeter.

Resistance within 11..15 Ohms indicates a wire break in the injector harness or a weak connection.

Otherwise the injector is faulty.

After repair, start the engine, reset the codes and make sure there is no signal from the “CHECK ENGINE” lamp.

Source

Features of deciphering error codes using the odometer on a VAZ-2114 car

Thus, using digital odometer combinations, you can diagnose a number of faults in the VAZ 21 14 model, and without using the on-board computer.

When diagnosing with an odometer, there is a very important nuance. The point is that the odometer summarizes the codes when there are several faults. For example, if the voltage in the electrical network is too high, and there are also difficulties in the fuel level sensor circuit in the gas tank, the odometer will sum up codes 2 and 4. As a result, the driver will see a number of 6 on the screen.

An additional feature is that all codes will be written to memory. At the same time, they will be stored until the owner of the car resets them manually. To delete or reset recorded numbers from the memory of the VAZ 214, you must do the following:

• turn on the ignition;
• disconnect the terminal from the battery for a few seconds (with the ignition on);
• disconnect the terminals.

After completing the steps, the error codes will disappear. It is recommended to perform this procedure before contacting a car service for diagnostic purposes. Errors are reset to service stations for a fee. Therefore, with simple steps you can save your money.

Symptoms of malfunction

The main driver symptom of P0202 is the MIL (Malfunction Indicator Light) illumination. 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 the ECM memory as a malfunction).
2. Floating speed, the car engine may operate unstably.
3. Increased fuel consumption.
4. The engine stalls or has trouble starting.
5. Jerking/misfire at idle or under load.
6. Poor speed gain.
7. Black smoke from the exhaust pipe.

P0202 is above average in severity and should be used with caution. Because the vehicle may experience serious problems, potentially affecting safety.

Decoding BC codes on a VAZ-2114 car

Next, we will focus on the most common error codes, which are identified using the car’s on-board computer. You need to understand that electronics do not always work correctly.

But, as evidenced by numerous reviews from car owners, the self-diagnosis of the VAZ 2114 error codes correspond to reality, that is, to real problems in the system of vehicle components.

It should be noted that each error requires a serious approach with a view to subsequent elimination.

For example, codes 0301 - 0304 indicate that misfires were detected in the cylinders of the power unit. If the system displays error 0480, then we are talking about a possible failure of the cooling system fan. The listed and other problems require timely intervention, replacement or repair of the relevant components and assemblies. The table shows the most common error codes for VAZ-2114 models.

After studying the presented data, owners of the fourteenth model will be able to determine what caused the problems in the car system, as well as determine an action plan for troubleshooting.

Finally, it should be noted that the VAZ-2114 car will produce errors about malfunctions of individual devices much less often if the breakdowns are corrected in a timely manner. On the AvtoVAZ model in question, this is quite easy to do. You can repair a car without involving specialists, but it must be done in a timely manner. It is also recommended to purchase high-quality gasoline and spare parts. The car must be prepared for the change of season by filling in the necessary fluids and replacing the tires. It is advisable to park the vehicle in a garage, especially in winter.

What repairs can fix error P2020?

To resolve error P2020 you may need to:

• Clearing error codes from your computer's memory and test driving the vehicle to see if the P2020 code appears again
• Repair or replacement of electrical wires
• Repair or replacement of electrical connectors
• Replacing the solenoid valve for the intake manifold geometry change system
• Replacing the intake manifold geometry variable valve position sensor or switch (bank 2)
• Cleaning or replacing the intake manifold variable geometry damper (bank 2)
• Replacing hoses or vacuum lines
• In rare cases, replacing the engine control module (ECM)

Connection and configuration features

The Multitronics on-board computer is connected to the diagnostic socket. If the connectors on the device and your car do not match, you will have to use adapters to connect. Installation is quite easy and usually there are no problems with it. If the model protocols are not suitable for your car, you can still connect to the speed sensor and injector. Even then, most functions will work.

First you will need to configure it in installation mode. You can select automatic mode. In this case, you will only need to indicate the type of gasoline and its consumption per 100 km in liters. The rest of the information about the car will be determined by the bookmaker himself. If the data it shows is incorrect, configure it manually by selecting the type of electrical unit.

Remember that the data is only read when the engine is running. Finally, you need to select a user mode, defining the functions that the device will use. Don't forget to indicate the engine cooling temperature, this is an important parameter.

Characteristic

The company constantly updates its lineup and improves functionality using modern technologies. Thanks to this, these are some of the best devices on the market, working perfectly with Russian cars.

A correctly configured Multitronics BC displays all information about the car faster than standard devices. In addition, it is located in a compressed form nearby.

Models

As mentioned above, the BC model range from this company is very wide and is regularly updated with new products.

Here are the main features of the most popular models to help you make a choice:

Possibilities

Almost all bookmakers from this company have a number of useful functions, including the following:

Advantages and disadvantages

Using such a device in a car has almost complete advantages for the driver. He gets full control over the condition of his vehicle and can always track the main parameters.

The disadvantages of these devices for their owners usually include an interface that is not always clear. Also, some users find it too minimal. This is probably due to technical shortcomings in processors and screens that do not allow more information to be displayed.

Error codes on the Multitronics on-board computer need to be known when computer diagnosing a car. This computer model is installed on both domestic and imported machines. This device has over 190 different functions. A digital monitor can diagnose several cars at once. If you use this device, you will constantly be aware of all vehicle malfunctions; it even analyzes and controls the quality of the fuel being poured. But what to do if the computer gives an error? What is causing the problem and what is broken? Later in the article we will describe in detail the errors generated by the on-board device.

On-board computer error codes

Multitronics are 5 characters that always start with the letter "G". Now let's describe the codes in order. If the screen displays error 0030, this means that the circuit from the oxygen sensor is broken.

Next 0031 - shorts the circuit between the same elements, until neutralization. 0032 - the same elements only short-circuit the body network, until neutralization. 0036 – also a break in the above system, after neutralization. 0037 – contact with the ground of the auto circuit after neutralization. 0038 – short circuit to the body after neutralization.

List of errors and notations

This is what the Multitronics on-board computer error codes look like. Now, when analyzing the problem, you will be aware of what it is.

INSTRUCTIONS FOR REPAIR AND OPERATION OF SPECIAL TRUCKS.

Explanation of J1939 protocol error codes for vehicles with a Cummins engine Code explanation Cause SPN FMI 27 4 EGR valve voltage below normal or shorted low 81 16 Intake DPF pressure Data valid but above normal range 84 2 based on vehicle speed Wheel data is unstable or intermittent 84 9 wheel based vehicle speed Abnormal update speed 84 10 wheel based vehicle speed Tampering has been detected 91 2 accelerator pedal positions 1 data not working or intermittent 91 3 accelerator pedal voltage above normal or short to positive 91 4 accelerator pedal voltage below normal or short to housing 91 9 accelerator pedal position 1 Abnormal update rate 91 19 accelerator pedal position 1 Data network received in error 95 16 Fuel differential pressure filter Data valid, but above normal range 97 3 Water in fuel Voltage above normal or short to plus 97 4 Water in fuel Voltage below normal or short low 97 15 Water in fuel data valid, but above normal range, 97 16 Water in fuel data valid, but above normal range 98 0 Engine oil Data confidence level, but above normal range, most severe 98 1 Engine Oil Level Data valid but below normal, 98 2 Engine Oil Level data erratic or intermittent 98 3 Engine Oil Voltage level above normal or short to positive 98 4 Engine Oil Voltage level below normal or short low 98 17 Engine Oil Level Data valid but below normal range, no less severe 100 1 Engine oil pressure sensor Data valid but below normal range, 100 2 Engine oil pressure sensor data unstable or intermittent 100 3 Engine oil pressure sensor voltage above normal or short to plus 100 4 Engine oil pressure Sensor voltage below normal or short circuit low 100 18 Engine oil pressure Sensor Data valid but below normal range 101 0 Crankcase pressure data valid but above normal range, 101 2 Crankcase pressure data unstable or intermittent 101 3 pressure in the crankcase Voltage is above normal or short to plus 101 4 crankcase pressure Voltage is below normal or short low 101 15 crankcase pressure data is valid, but above the normal level, at least severe 101 16 crankcase pressure Data is valid, but above the normal range 102 3 Intake manifold No. 1 Pressure sensor Voltage above normal or short to positive 102 4 Intake manifold No. 1 Pressure sensor Voltage below normal or short to low 103 2 speed Turbocharger data unstable or intermittent 103 10 speed Turbocharger change abnormal speed 103 15 speed Turbocharger data valid but above normal level, at least severe 103 16 Turbocharger speed Data valid, but above normal range 103 18 Turbocharger speed Data valid, but below normal range 105 0 consumption Manifold tempature data valid, but above normal range, 105 2 Engine oil pressure sensor data erroneous or intermittent 105 3 Intake manifold tempature voltage above normal or short to positive 105 4 Intake manifold tempature voltage below normal or short circuit low 105 15 Intake manifold engine temperature data valid but above normal range, less severe 110 0 Engine coolant temperature sensors data valid but above normal range, heaviest 110 3 Engine Coolant Tempature Sensor Voltage above normal or short to positive 110 4 Engine Coolant Tempature Sensor voltage below normal or short low 110 15 Engine Coolant Tempature Sensor data valid but above normal level, at least heavy 110 16 Tempature Engine Coolant Sensor Data valid, but above normal range 110 31 Engine Coolant Tempature Sensor condition exists 111 3 Engine Coolant Level Voltage above normal or short to positive 111 4 Engine Coolant Level Voltage below normal or short circuit low 111 17 Engine coolant level Data valid, but below normal, no less serious 111 18 Engine coolant level Data valid, but below normal range 157 0 Engine Injector gauge rail 1 Data valid, but above normal range, most heavy 157 3 engine rail Injector metering 1 Voltage above normal or below, high 157 4 engine Injector metering rail 1 Voltage below normal or short low 157 16 Engine Injector metering rail 1 Data valid, but above normal range 167 1 Charging system Data valid, but below normal range, heaviest 167 16 charging system data valid, but above normal range 167 18 charging system data valid, but below normal range 168 16 baht power input 1 data valid, but above normal range 168 18 baht power consumption 1 data valid, but below normal range 190 0 Speed ​​sensor data valid but above normal Range, heaviest 190 2 Engine speed sensor data erratic or intermittent 190 2 Engine speed data erratic or intermittent 191 9 gear Output shaft speed Abnormal update rate 251 10 Time abnormal oscillation abnormal speed change 411 2 EGR differential pressure data unstable or intermittent 411 3 EGR differential pressure Voltage above normal or short to positive 411 4 EGR differential pressure Voltage below normal or short circuit low 411 18 EGR differential pressure data valid but below normal range 412 2 EGR temperature data unstable or periodic 412 3 EGR Temperature Voltage above normal or short to positive 412 4 EGR Temperature Voltage below normal or short circuit low 412 15 EGR temperature data valid, but above normal level, at least severe 412 16 EGR Temperature Data valid , but above normal range 444 16 Power consumption Batt 2 Data valid, but above normal range 444 18 Power consumption Butt 2 data valid, but below normal range 558 9 Accelerator pedal 1 Abnormal update rate 558 19 Accelerator pedal 1 Network data received in error 612 2 motor Speed ​​sensor lost both signals / connected backwards 627 2 power supply data unstable or intermittent 627 12 Power supply Bad device 629 12 engine control unit Bad device 630 12 Memory calibration Bad device 633 31 fuei motor drive 1 control condition exists 639 2 L 939 Network data unstable or intermittent 639 9 J1939 networks Abnormal update rate 639 9 J1939 networks Abnormal update rate 639 13 L 939 Network From calibration 641 7 VG Turbo drive 1 mechanical system not responding 641 9 VG Turbo drive 1 Abnormal update rate 641 11 V. G. Turbo drive 1 reason unknown 641 12 V. G. Turbo drive 1 Bad device 641 13 V. G. Turbo drive 1 From calibration 641 15 V. G. Turbo drive 1 Data valid, but above normal level, at least severe 641 31 V. G. Turbo drive 1 condition exists 647 3 clutch fan motor voltage above normal or short to positive 647 4 clutch motor fan voltage below rtormai or short low 651 5 Injector cylinder no. 1 Current below normal or open circuit 652 5 Injector cylinder no. 2 Current below normal or open circuit 653 5 Injector cylinder #3 Current below normal or open circuit 654 5 Injector cylinder #4 Current below normal or open circuit 655 5 Injector cylinder #5 Current below normal or open circuit 656 5 Injector cylinder #6 Current below normal or open circuit 677 3 Starter refay Voltage above normal or short circuit high 677 4 engine starter relay Voltage below normal or short circuit low 703 11 # Auxiliary I/O 3 root cause unknown

703 14 Additional I/O No. 3 Special instructions

723 2 2 motor speed data unstable or intermittent

723 2 2 motor speed data unstable or intermittent

729 3 Engine heater consumption Voltage above normal or below, high

729 4 motor heater consumption Voltage below normal or short circuit low

974 3 Remote accelerator pedal voltage is above normal or below, high