OBD2: fault codes and their interpretation

Car errors: searching and deleting codes

A person who has just bought a brand new car and has no driving experience often asks questions about car error codes, what do they mean and how to eliminate them?

Car error codes come in different types, depending on the car model. In a modern car, which operates electronically, in most cases it is equipped with self-diagnosis, which sees any malfunction of the car and informs the car owner about it in the form of an error code.

What do you need to know about the Check Engine Light?

Some drivers try to clear the engine error by disconnecting the battery. These manipulations really allow you to get rid of the problem. However, the lamp may light up again after a while. This means that no typical reason is suitable for this situation, and it turns out that it is necessary to perform a more in-depth diagnosis.

For this purpose, special software and hardware systems are used, which not only find any errors in the operation of the ECU and engine, but also know how to eliminate them. If the error was resolved during the tests, the lamp will go out. In some cases, it is necessary to drive the car for some time to reset the error. This may be due to the fact that the control unit needs time for in-depth testing and debugging of the operation of all car systems. If the lamp does not go out, you need to continue searching for the problem.

Tips for finding errors in cars

When diagnosing a car for errors, look at the length of the cable that goes from the scanner to the computer - it should not exceed 5 meters. If the cable is more than five meters, the diagnosis may be incorrect

After you have purchased a scanner, carefully read the operating instructions.

You should turn on the ignition in the car only after connecting the scanner to the computer and completing the settings. This is necessary in order to exclude the possibility of damage to the on-board computer.

VAZ

To independently diagnose a VAZ, you can also use the diagnostic connector, but it is also permissible to do this by the vehicle itself. To do this, you need to hold down the odometer button, then turn the key to the first position, then release the button. After this, the arrows will jump.

Then the odometer is pressed again - the driver will see the firmware number. When pressed a third time, you can get a diagnostic code. Any VAZ engine error in a car will be presented as two digits, not four. They can be deciphered using the corresponding tables.

The information provided can help experienced and novice car enthusiasts better understand their car. Errors arise from time to time, but the main thing is to be able to eliminate them in a timely manner. Previously, there were no such options in Soviet cars, and the driver could not know what the engine was “swearing” at. Today there are many possibilities for diagnostics, repair, and condition monitoring. And with the help of modern software, there is nothing easier than figuring out how to reset an engine error from the ECU memory.

Diagnosis of car errors

You can diagnose a car yourself not only using a computer, but also using mobile applications on the Android or Apple platform. There are many different applications on the Internet for this procedure, some of them can read vehicle code errors, find the cause and eliminate them. For example, for the OBD-II scanner there are special programs for Android that will tell you about all the car error codes and methods for eliminating them. In order to download it, you need to enter the name of the application on the play market “Deciphering OBD-II error codes”. In these programs you will find a lot of useful things, but the main thing is that the database contains all the car error codes.

If you use an Apple phone, then there is simply an ideal application for you to know what error codes are in your car, the program itself eliminates or deletes them. The application is sold with a cable for connection to the car. GoPoint Techonogy – works with GL-1 and BT-1 scanners. The scanner data and applications are official Apple applications, where GL-1 is a cable for connecting the car to the phone, and BT is a Bluetooth transmitter. The program not only helps eliminate car code errors, but also checks the operation of the engine, all sensors and much more. These two scanner-transmitters not only work with the native GoPoint Techonogy program, but are also compatible with DashCommand.

There are many applications, programs, scanners with which you can identify car error codes and eliminate them yourself. These maintenance services will cost a lot of money, but why pay for something you can do yourself? To use these applications, it is not necessary to have a professional level of computers and gadgets; you just need to know how to install the application. And may your car last for many years!

Fuel filler cap

Most drivers, when an error occurs, always think about the existence of very serious problems. But few people think to check whether the fuel system is tight. But this same tightness can be easily broken by a gas tank cap that is not tightly closed. And this is a fairly common situation!

What does this have to do with engine error? The fact is that when the lid is not tightly closed, air passes into the system, which increases fuel consumption. Because of this, the diagnostic system generates an error.

Diagnostic codes for ECU Mikas 10.3/11 Euro-2 / Euro-3

P0101 - Mass air flow sensor signal out of acceptable range
P0102 - Mass Air Flow Sensor Circuit Low
P0103 - Mass Air Flow Sensor Circuit High
P0106 - Absolute pressure sensor signal out of acceptable range
P0107 - Intake Air Absolute Pressure Sensor Circuit Low
P0108 - Intake Air Absolute Pressure Sensor Circuit High
P0112 - Air Temperature Sensor Circuit Low
P0113 - Air Temperature Sensor Circuit High
P0116 - Coolant temperature sensor signal out of acceptable range
P0117 - Coolant Temperature Sensor Circuit Low
P0118 - Coolant Temperature Sensor Circuit High
P0121 - Throttle position sensor signal out of range
P0122 - Throttle Position Sensor Circuit Low
P0123 - Throttle Position Sensor Circuit High
P0130 - Oxygen sensor No. 1 circuit faulty
P0131 - Low signal level of oxygen sensor No. 1, to the converter
P0132 - High signal level of oxygen sensor No. 1, to the converter
P0133 - Slow response to rich or lean oxygen sensor No. 1
P0134 - Open circuit of oxygen sensor No. 1
P0135 - No. 1 Oxygen Sensor Heater Malfunction
P0136 - No. 2 Oxygen Sensor Circuit Malfunction
P0137 - Low signal level of oxygen sensor No. 2 (after the converter)
P0138 - High signal level of oxygen sensor No. 2 (after the converter)
P0140 - Oxygen sensor signal circuit open No. 2
P0141 - No. 2 Oxygen Sensor Heater Malfunction
P0171 - Fuel system too lean
P0172 - Fuel system too rich
P0200 - Injector control circuit faulty
P0201 - Injector 1 control circuit open
P0202 - Injector 2 control circuit open
P0203 - Injector 3 control circuit open
P0204 - Injector 4 control circuit open
P0217 - Engine cooling system overheating
P0219 - Exceeding the permissible engine speed
P0222 - No. 2 Throttle Position Sensor Circuit Low
P0223 - No. 2 Throttle Position Sensor Circuit High
P0230 - Fuel pump relay control circuit malfunction
P0261 - Injector 1 control circuit short to ground
P0262 - Short circuit to power supply or open circuit of injector 1
P0263 - Injector 1 driver faulty
P0264 - Injector 2 control circuit short to ground
P0265 - Short circuit to the on-board network or open circuit of injector 2
P0266 - Injector 2 driver faulty
P0267 - Injector 3 control circuit short to ground
P0268 - Short circuit to power supply or open circuit of injector 2
P0269 - Injector 3 driver faulty
P0270 - Injector 4 control circuit short to ground
P0271 - Short circuit to the on-board network or open circuit of injector 4
P0272 - Injector 4 driver faulty
P0297 - Vehicle speed exceeded
P0300 - Random/Multiple Misfires
P0301 - Misfire in cylinder 1
P0302 - Misfire in cylinder 2
P0303 - Misfire in cylinder 3
P0304 - Misfire in cylinder 4
P0325 - Knock sensor circuit open
P0327 - Knock Sensor Circuit Low
P0328 - Knock Sensor Circuit High
P0335 - Crankshaft Position Sensor Circuit Malfunction
P0336 - Crankshaft Position Sensor Signal Out of Range
P0337 - Crankshaft position sensor circuit short to ground
P0338 - Crankshaft position sensor circuit open
P0340 - Camshaft Position Sensor (Phase Sensor) Circuit Malfunction
P0342 - Camshaft Position Sensor (Phase Sensor) Circuit Low
P0343 - Camshaft Position Sensor (Phase Sensor) Circuit High
P0351 - Ignition coil 1 primary circuit open
P0352 - Ignition coil 2 primary circuit open
P0353 - Ignition coil 3 primary circuit open
P0354 - Ignition coil 4 primary circuit open
P0422 - Neutralizer efficiency is below acceptable
P0441 - Incorrect air flow through the canister purge valve
P0443 - Canister purge valve control circuit malfunction
P0444 - Short circuit to the on-board network or open circuit of the canister purge valve control circuit
P0445 - Short circuit to ground, canister purge valve control circuit
P0480 - No. 1 Fan Relay Control Circuit Malfunction
P0481 - No. 2 Fan Relay Control Circuit Malfunction
P0500 - No signal from vehicle speed sensor
P0501 - Speed Sensor Circuit Malfunction
P0503 - Speed sensor signal intermittent
P0505 - Idle Air Control Circuit Malfunction
P0506 - Low idle speed (idle speed control locked)
P0507 - High idle speed (idle speed control locked)
P0508 - Idle speed control circuit short circuit to ground
P0509 - Short circuit of the idle speed control stepper control circuit to the on-board network
P0511 - Open circuit for idle speed control stepper control
P0560 - On-board voltage below operating threshold
P0562 - Undervoltage on-board network
P0563 - On-board network voltage too high
P0572 - Brake Pedal Switch A: Signal Low
P0573 - Brake Pedal Switch A: High Signal
P0601 - Controller ROM failure
P0602 - Controller RAM failure
P0603 - Controller internal RAM failure
P0604 - Controller external RAM failure
P0615 - Starter relay control circuit open
P0616 - Starter relay control circuit short to ground
P0617 - Short circuit to the starter relay control circuit
P0627 - Fuel pump relay control circuit open
P0628 - Fuel pump relay control circuit short to ground
P0629 - Short circuit to the on-board network of the fuel pump relay control circuit
P0630 - VIN storage fault or vehicle VIN is not written to the controller
P0645 - Open air conditioner clutch relay control circuit
P0646 - A/C clutch relay circuit short to ground
P0647 - Short circuit to the on-board network of the air conditioner clutch relay circuit
P0650 - Check engine lamp circuit malfunction
P0654 - Instrument panel tachometer circuit malfunction
P0685 - Main relay control circuit open
P0687 - Short circuit to main relay control circuit
P0688 - Open circuit from the main relay output
P0690 - Short circuit to main relay power circuit
P0719 - Brake pedal switch B: signal low
P0724 - Brake pedal switch B: high signal level
P0831 - Clutch pedal switch A: low signal level
P0832 - Clutch pedal switch A: high signal level
P1102 - Oxygen Sensor No. 1 Heater Resistance Low
P1115 - Oxygen Sensor No. 1 Heater Control Circuit Malfunction
P1123 - Mixture "rich" - additive correction of the air-fuel mixture exceeds the set threshold
P1124 - Composition “lean” - additive correction of the air-fuel mixture exceeds the set threshold
P1127 - Mixture “rich” - multiplicative correction of the fuel-air mixture composition exceeds the set threshold
P1128 - Composition “lean” - multiplicative correction of the fuel-air mixture composition exceeds the set threshold
P1135 - No. 1 Oxygen Sensor Heater Malfunction
P1136 - Mixture "rich" - additive correction of the fuel-air mixture for fuel exceeds the set threshold
P1137 - Composition “lean” - additive correction of the fuel-air mixture for fuel exceeds the set threshold
P1140 - Incorrect air flow sensor signal
P1141 - No. 2 Oxygen Sensor Heater Malfunction
P1171 - CO potentiometer signal low
P1172 - High signal level of the CO potentiometer
P1386 - Knock Channel Internal Test Error
P1410 - Short circuit to the on-board network or open circuit for the control circuit of the canister purge valve
P1425 - Short circuit to ground of the canister purge valve control circuit
P1426 - Open circuit for controlling the canister purge valve
P1500 - Fuel pump relay control circuit open
P1501 - Fuel pump relay control circuit short to ground
P1502 - Short circuit to the on-board network or open circuit of the fuel pump relay
P1509 - Idle Air Control Circuit Overload
P1513 - Idle air control control circuit short to ground
P1514 - Short circuit to the on-board network or open circuit of the idle air regulator control circuit
P1541 - Fuel pump relay control circuit open
P1570 - No response from APS (immobilizer) or open circuit
P1571 - Unregistered electronic key used
P1572 - Immobilizer antenna breakage
P1573 - Internal malfunction of the APS unit (immobilizer)
P1600 - No communication with APS (immobilizer)
P1601 - No communication with APS (immobilizer)
P1602 - Loss of on-board voltage
P1603 - Controller EEPROM fault
P1606 - Rough Road Sensor Invalid Signal
P1612 - Controller reset error
P1616 - Rough road sensor signal low
P1617 - Rough road sensor signal high
P1620 - Controller ROM failure
P1621 - Controller RAM failure
P1622 - Controller EEPROM fault
P1632 - Malfunction of spring 1 of the electric throttle valve
P1633 - Malfunction of spring 2 of the electric throttle valve
P1634 - Malfunction of the throttle valve adaptation procedure
P1635 - Malfunction of the procedure for adapting the closed position of the electric throttle valve
P1636 - Malfunction of the procedure for adapting the de-energized position of the electric throttle drive
P1640 - Failure to access controller EEPROM
P1689 - Invalid error codes in the controller memory
P1750 - Short circuit to the on-board network of circuit No. 1 for controlling the idle speed regulator
P1751 - Open circuit No. 1 of the idle speed control torque control
P1752 - Short circuit to ground in idle speed control circuit No. 1
P1753 - Short circuit to the on-board network of circuit No. 2 for controlling the idle speed regulator
P1754 - Open circuit No. 2 of the idle speed control torque control
P1755 - Short circuit to ground of circuit No. 2 of idle speed control torque control
P2104 - Throttle valve electric drive control system: limiting the operation of the internal combustion engine to the OMV mode
P2105 - Throttle valve electric drive control system: internal combustion engine operation prohibited
P2106 - Electric throttle control system: power limitation
P2110 - Electric throttle control system: speed limitation
P2112 - Electric throttle control system: position controller error in opening direction
P2113 - Electric throttle control system: position controller error in closing direction
P2122 - Low signal level of the electric accelerator pedal position sensor No. 1
P2123 - Low signal level of the electric accelerator pedal position sensor No. 1
P2127 - High signal level of the electric accelerator pedal position sensor No. 2
P2128 - High signal level of the electric accelerator pedal position sensor No. 2
P2135 - Throttle position sensor correlation error
P2138 - Correlation error of electric accelerator pedal position sensors
P2299 - Brake pedal position sensor error
P2301 - Euro-2: Short circuit to the on-board network of the ignition coil 1 circuit
P2303 - Euro-2: Short circuit to the on-board network of the ignition coil 2 circuit
P2305 - Euro-2: Short circuit to the on-board network of the ignition coil 3 circuit
P2307 - Euro-2: Short circuit to the on-board network of the ignition coil 4 circuit
P2301 - Euro-3: Short circuit to the on-board network of the ignition coil 1 circuit
P2304 - Euro-3: Short circuit to the on-board network of the ignition coil 2 circuit
P2307 - Euro-3: Short circuit to the on-board network of the ignition coil 3 circuit
P2310 - Euro-3: Short circuit to the on-board network of the ignition coil 4 circuit