If a CHECK error occurs in a Lada Largus car, the driver should contact a service center or conduct self-diagnosis. Error codes are stored in the ECM memory. To identify a malfunction from the ECU memory, connect a scanner to the diagnostic connector, turn on the ignition and perform the following operations:
— checking for fault codes;
— control of data transfer from the computer.
ECM fault codes are divided into current and intermittent. Current fault codes are faults that are currently active, and non-permanent fault codes are faults that are not currently detected, but were previously recorded by the system. The table below shows the main ECM fault codes.
| Error code | Possible problem node or circuit |
| DF001 | Coolant temperature sensor circuit |
| DF002 | Air temperature sensor circuit |
| DF022 | On-Board Diagnostic Warning Lamp Circuit |
| DF038 | ECU operation |
| DF040 | Cylinder 1 injector circuit |
| DF041 | Cylinder 2 injector circuit |
| DF042 | Cylinder 3 injector circuit |
| DF043 | Cylinder 4 injector circuit |
| DF081 | Canister purge solenoid valve circuit |
| DF082 | Control oxygen sensor heating circuit |
| DF083 | Diagnostic oxygen sensor heating circuit |
| DF084 | ECM actuator relay control circuit |
| DF091 | Vehicle speed information |
| DF092 | Oxygen sensor control circuit |
| DF093 | Diagnostic oxygen sensor circuit |
| DF123 | Misfire of the fuel mixture |
| DF232 | Refrigerant Pressure Sensor Circuit |
| DF328 | Throttle Position Sensor Circuit |
| DF330 | Knock sensor circuit |
| DF336 | Engine speed sensor circuit |
| DF352 | Anti-theft circuit |
| DF353 | MAP sensor circuit |
| DF360 | IAC circuit |
| DF361 | Ignition coil circuit for cylinders 1 and 4 |
| DF362 | Ignition coil circuit for cylinders 2 out |
| DF514 | Fuel pump relay circuit |
| DF587 | Sensor power supply circuit – 5 V |
Common ECM malfunctions and recommendations for their elimination
Error codes DF001, DF002 - malfunction of the air temperature sensor
You should check the integrity of the sensor connections, short circuits to the power supply and ground, and the sensor itself.
Error code DF038 - ECU operation error
The ECU software and the ECU itself (hardware, preferably by replacing it with a known good one) are checked for compliance.
Error codes DF040 – DF043 - error of the corresponding injectors
Check the integrity of the connections, possible short circuits in the circuits and the operation of the injectors.
Error code DF082 - control sensor error Check possible short circuits and the condition of the connectors and wiring of the sensor, as well as the functionality of the sensor by replacing it.
Error code DF123 - mixture misfires Check the operation of the injectors, spark plugs, ignition coil, etc.
Error code DF232 - Refrigerant pressure sensor error
Check the integrity of connections, possible short circuits, and the operation of the sensor.
Error code DF336 - crankshaft position sensor violation
Check possible short circuits and the condition of the connections, the reliability of the sensor’s fastening and its functionality.
Error code DF360 - IAC error
Check the operation of the IAC and its circuits, the reliability of attachment to the pipe.
Error code DF394 - catalytic converter error.
They check the tightness of the exhaust gas system, perform a visual inspection of the catalyst design, and check the consumption of engine oil and coolant. Most likely, the catalyst failed due to poor quality fuel.
Fault Codes and ECM Troubleshooting
To read fault codes from the ECU memory, connect a diagnostic tool to the diagnostic connector, turn on the ignition and perform the following operations: - checking for the presence of fault codes; — control of data transfer from the computer. ECM fault codes are divided into current and intermittent. Current fault codes are faults that are currently active, and non-permanent fault codes are faults that are not currently detected, but were previously recorded by the system. The table below shows the main ECM fault codes.
| Fault code | Possible problem node or circuit |
| DF001 | Coolant temperature sensor circuit |
| DF002 | Air temperature sensor circuit |
| DF022 | On-Board Diagnostic Warning Lamp Circuit |
| DF038 | ECU operation |
| DF040 | Cylinder 1 injector circuit |
| DF041 | Cylinder 2 injector circuit |
| DF042 | Cylinder 3 injector circuit |
| DF043 | Cylinder 4 injector circuit |
| DF081 | Canister purge solenoid valve circuit |
| DF082 | Control oxygen sensor heating circuit |
| DF083 | Diagnostic oxygen sensor heating circuit |
| DF084 | ECM actuator relay control circuit |
| DF091 | Vehicle speed information |
| DF092 | Oxygen sensor control circuit |
| DF093 | Diagnostic oxygen sensor circuit |
| DF123 | Misfire of the fuel mixture |
| DF232 | Refrigerant Pressure Sensor Circuit |
| DF328 | Throttle Position Sensor Circuit |
| DF330 | Knock sensor circuit |
| DF336 | Engine speed sensor circuit |
| DF352 | Anti-theft circuit |
| DF353 | MAP sensor circuit |
| DF360 | IAC circuit |
| DF361 | Ignition coil circuit for cylinders 1 and 4 |
| DF362 | Ignition coil circuit for cylinders 2 out |
| DF514 | Fuel pump relay circuit |
| DF587 | Sensor power supply circuit - 5 V |
Common ECM malfunctions and recommendations for their elimination
Error codes DF001, DF002 - malfunction of the air temperature sensor. Check the integrity of the sensor connections, short circuits to the power supply and ground, and the sensor itself.
Error code DF038 - ECU operation error Check the ECU software and the ECU itself (hardware, preferably by replacing it with a known good one) for compliance.
Error codes DF040 - DF043 - error of the corresponding injectors Check the integrity of the connections, possible short circuits in the circuits and the operation of the injectors.
Error code DF082 - control sensor error Check possible short circuits and the condition of the connectors and wiring of the sensor, as well as the functionality of the sensor by replacing it.
Error code DF123 - mixture misfires Check the operation of the injectors, spark plugs, ignition coil, etc.
Error code DF232 - refrigerant pressure sensor error Check the integrity of connections, possible short circuits, and operation of the sensor.
Error code DF336 - violation of the crankshaft position sensor Check possible short circuits and the condition of the connections, the reliability of the sensor's fastening and its functionality.
Error code DF360 - IAC error Check the operation of the IAC and its circuits, the reliability of attachment to the pipe.
Error code DF394 - catalytic converter error. They check the tightness of the exhaust gas system, perform a visual inspection of the catalyst design, and check the consumption of engine oil and coolant. Most likely, the catalyst failed due to poor quality fuel.
Troubleshooting that is intermittent
First, you need to check for possible electrical circuit problems. Particular attention should be paid to the following: - absence of deformation on the terminal connections; — reliability of mechanical compression of terminals with wires; — no cracks, signs of damage, or melting on the pad bodies. After turning on the ignition and starting the engine, it is necessary to move the wire harnesses, starting from the connectors and along the harness, while monitoring the operation of the ECM using a diagnostic tool. If a fault is detected in the wiring harness, it must be repaired.
Checking the operation of the ECM
The performance of the ECU is checked using a diagnostic tool, and it is switched to the “Parameters” - “General View” mode.
If during diagnostics the message “Theft deterrent system is active” appears, you should check the operation of the standard anti-theft device.
On-Board Diagnostic System
The vehicle's ECM has an on-board diagnostic system, which includes a warning light in the instrument cluster that lights up when it detects that the exhaust gas toxicity threshold has been exceeded, and also alerts the driver to the need for repair work.
The on-board diagnostic system includes the following types: — misfire of the fuel mixture; — control of the control oxygen sensor; — control of ECM elements; - catalyst control. The on-board diagnostic warning light turns on if the on-board system detects the same fault during several trips or engine starts, as well as when faults are detected in electrical circuits. The OBD warning light flashes when a misfire in the fuel mixture is detected. This emergency situation leads to failure of the catalytic converter. Information about malfunctions is entered into the non-volatile memory of the computer; this information is deleted automatically after 40 subsequent tests, as well as using a diagnostic tool.
Diagnostics of the operation of the electronic engine immobilizer
The ECM of the Lada Largus car includes an electronic anti-theft engine start immobilizer ( EPBZD ), which prevents unauthorized engine starting by breaking the ECM control circuits.
In turn, the ECU has the ability to individually encode the digital signal generated by the EPBZD control unit to allow or prohibit engine starting.
The EPBD or immobilizer is an electronic device that includes an electronic control unit with a communication coil on the ignition switch, a warning lamp located on the dashboard (Fig. 2) and keys with a radio frequency remote control.
The electronic control unit EPBD is connected to the ECM via a diagnostic line, which is switched by a relay (part of the control unit).
If the diagnostic tool is not connected to the diagnostic socket, the diagnostic line is used to communicate with the ECM and the electronic control unit. When a scan tool is connected, the line automatically switches between the ECM and the scan tool. Please note that the ECM control unit has priority over the diagnostic tool - in the event of information exchange between the ECM and the ECM control unit, the connection between the ECM and the diagnostic tool is broken.
The EPBZD control unit is installed under the vehicle's dashboard.
Activation of operation, error codes and fault diagnosis of the EPBD system
EPBZD control unit. The ECM and ignition key are supplied uncoded from the factory. Therefore, after installing them on the car, it is necessary to activate the electronic engine immobilizer system.
It is necessary to take into account that after activation, the ignition key and the EPBZ control unit will only work on this vehicle; it is impossible to remove the activation or re-encode the system.
The procedure for activating the EPBZD system is carried out using a diagnostic tool with preliminary flashing of the activation code from the PC memory.
During the procedure for activating the ECU code, data is exchanged and the information stored in the memory of the ECM is compared with the code transmitted from the diagnostic tool. One of the main stages of verification is the comparison of the vehicle VIN code data, which is individual for each vehicle.
Diagnostics of malfunctions of the EPBD system
In the same way as when checking for the presence of ECM error codes, error codes of the ECM system are detected. A diagnostic device is connected to the diagnostic socket, after which the error codes are read.
Here are the main error codes , approximate faults and their elimination methods.
Error code DF055 - coded line circuit Most likely, the connection between the electronic units of the ECM and ECM is broken - check the connection between contact 40 of the ECM unit and contact 58 of the ECM.
Error code DF059 - there is no communication between the electronic unit of the ECM and the ECM. Check the condition of the contacts and the reliability of their connections, as well as the corresponding circuits for short circuit with + 12 V or to ground. After troubleshooting, the error codes should be cleared from the ECM memory.
Video
Troubleshooting that is intermittent
First, you need to check for possible electrical circuit problems. Particular attention should be paid to the following: - absence of deformation on the terminal connections; — reliability of mechanical compression of terminals with wires; — no cracks, signs of damage, or melting on the pad bodies.
After turning on the ignition and starting the engine, it is necessary to move the wire harnesses, starting from the connectors and along the harness, while monitoring the operation of the ECM using a diagnostic tool. If a fault is detected in the wiring harness, it must be repaired.
How to Troubleshoot or Reset Trouble Code P2119
Some suggested steps to troubleshoot and fix error code P2119:
- Diagnose the code according to the manufacturer's verification test to check the signal.
- Clear the error codes from your computer's memory and test drive the vehicle to see if the P2119 code appears again.
- Using the accelerator pedal, check the throttle position sensors and drive operation.
- Inspect the accelerator pedal as well as the throttle valve for sticking in the open or partially open position.
- Check the harness and connection visually for problems, and correct problems if necessary.
- Test the actuator according to the manufacturer's specified spot test.
- If no problem is found, the engine control module (PCM) must be inspected and replaced if necessary.
On-Board Diagnostic System
The vehicle's ECM has an on-board diagnostic system, which includes a warning light in the instrument cluster that lights up when it detects that the exhaust gas toxicity threshold has been exceeded, and also alerts the driver to the need for repair work.
The on-board diagnostic system includes the following types:
— misfire of the fuel mixture; — control of the control oxygen sensor;
— control of ECM elements;
- catalyst control.
The on-board diagnostic warning light turns on if the on-board system detects the same fault during several trips or engine starts, as well as when faults are detected in electrical circuits.
The OBD warning light flashes when a misfire in the fuel mixture is detected. This emergency situation leads to failure of the catalytic converter.
Information about malfunctions is entered into the non-volatile memory of the computer; this information is deleted automatically after 40 subsequent tests, as well as using a diagnostic tool.
Description and meaning of error P2119
This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II equipped vehicles that use a throttle control system to drive - wire including but not limited to vehicles from Ford, Mazda, Nissan, Chevy, Toyota, Cadillac, GMC, Land Rover, etc. OBD-II Trouble Code P2119 is one of several possible codes that indicates that the Powertrain Control Module (PCM) has detected a malfunction with the operation of the throttle control system. There are 6 codes that are associated with malfunctions of the throttle actuator control system and they are P2107, p2108, p2111, p2112, P2118 and P2119. Code P2119 is set by the PCM when the throttle body is out of range or not operating properly. The PCM monitors the throttle actuator control system by monitoring one or more throttle position sensors. Throttle body operation is determined by the position of the throttle plate, which is controlled by one or more throttle servomotors. The PCM also monitors the accelerator pedal position sensor to determine how fast the driver wants to go and then determines the appropriate throttle response. The PCM accomplishes this by changing the current flow to the throttle actuator control motor which moves the throttle plate to the desired position. Certain malfunctions can cause the PCM to limit the operation of the Throttle Actuator Control System. This is known as fail-safe or limp mode, where the engine is held at idle or may not start at all.
Diagnostics of the operation of the electronic engine immobilizer
The ECM of the Lada Largus vehicle includes an electronic anti-theft engine start immobilizer (EPISD), which prevents unauthorized engine starting by breaking the ECM control circuits.
In turn, the ECU has the ability to individually encode the digital signal generated by the EPBZD control unit to allow or prohibit engine starting.
The EPBD or immobilizer is an electronic device that includes an electronic control unit with a communication coil on the ignition switch, a warning lamp located on the dashboard (Fig. 2) and keys with a radio frequency remote control.
The electronic control unit EPBD is connected to the ECM via a diagnostic line, which is switched by a relay (part of the control unit).
If the diagnostic tool is not connected to the diagnostic socket, the diagnostic line is used to communicate with the ECM and the electronic control unit. When a scan tool is connected, the line automatically switches between the ECM and the scan tool. Please note that the ECM control unit has priority over the diagnostic tool - in the event of information exchange between the ECM and the ECM control unit, the connection between the ECM and the diagnostic tool is broken.
The EPBZD control unit is installed under the vehicle's dashboard.
ECU error codes
Determining malfunctions of engine sensors and electrical equipment begins with diagnostics. A diagnostic computer is connected to the electronic engine control unit and the presence of errors is determined, which indicate malfunctions of the power plant elements.
Decoding error codes for the Lada Largus engine:
The following errors are less common:
Activation of operation, error codes and fault diagnosis of the EPBD system
EPBZD control unit. The ECM and ignition key are supplied uncoded from the factory. Therefore, after installing them on the car, it is necessary to activate the electronic engine immobilizer system.
It is necessary to take into account that after activation, the ignition key and the EPBZ control unit will only work on this vehicle; it is impossible to remove the activation or re-encode the system.
The procedure for activating the EPBZD system is carried out using a diagnostic tool with preliminary flashing of the activation code from the PC memory.
During the procedure for activating the ECU code, data is exchanged and the information stored in the memory of the ECM is compared with the code transmitted from the diagnostic tool. One of the main stages of verification is the comparison of the vehicle VIN code data, which is individual for each vehicle.
Symptoms of malfunction
The main driver symptom of P2119 is the MIL (Malfunction Indicator Light) illumination. It is also called Check engine or simply “check light”.
They can also appear as:
- The “Check engine” warning light on the control panel will light up (the code will be stored in memory as a malfunction).
- Other related trouble codes may also be present.
- Transition of the vehicle to fail-safe or emergency mode.
- The engine cannot be accelerated and the throttle response is unresponsive.
- The automatic transmission does not shift.
- The engine stalls or has trouble starting.
- Reduced engine power.
- Black smoke from the exhaust pipe.
- Increased fuel consumption.
The severity of this code can range from moderate to severe depending on the specific problem. Therefore, it is worth paying close attention to it.
Lada Largus error codes - decoding and designation. 16 valves, K4M
Error codes for the Lada Vesta, like any other modern car, are recorded in the system memory and can be retrieved from it using diagnostic equipment. If any malfunction occurs in the system, the error is recorded in memory and the Check Engine icon is displayed on the dashboard.
To read Lada Vesta errors, an OBD-II connector is used, to which diagnostic equipment is connected.
ELM327 programs for Android devices (smartphone or tablet)
With the help of these programs, you can conduct a full diagnostic of your car using the elm327 adapter and your Android smartphone or tablet. These elm327 programs for android support both bluetooth and wi-fi adapters. Along with the description of the program there is a link to download the program from the official Google Play website, so you can be sure of the safety of your device. You can also install it simply by typing the name of the program in the Google Play search for your device.
Torque
The most popular elm327 program for android. Universal and very functional, works great with all brands of cars. There is a free and paid version of the program, which differ in functionality.
Works with adapters: Bluetooth, Wi-Fi
OpenDiag Mobile
A very convenient program for diagnosing Russian-made cars with excellent capabilities. OpenDiag Mobile is free and has a clear Russian interface.
Works with adapters: Bluetooth, Wi-Fi, USB
ScanMaster Lite
An excellent universal program suitable for a huge number of brands. There is a Russian interface and the necessary set of functions. ScanMaster Lite is definitely one of the recommended programs.
Works with adapters: Bluetooth, Wi-Fi
DashCommand
It’s also a fairly good and popular program with a good set of functions and support for many cars. Of the minuses, it is worth noting the lack of a Russian interface.
Works with adapters: Bluetooth, Wi-Fi
OBD Auto Doctor
Universal elm327 program with a Russian interface and a good set for diagnostics. There are two versions: free and paid, as usual, the free version has slightly reduced functionality.
Works with adapters: Bluetooth, Wi-Fi
