P2054 - OBD Trouble Code

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The trouble code P2054 can be explicated as Reductant Injection Valve Circuit Low Bank 1 Unit 2. This error code would indicate an issue with the circuit which controls the reductant injector. The terms “circuit low” would refer to a lower than expected voltage in the reductant control circuit. This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

It is the engine control module which would examine the reductant injection valve circuit.This trouble code would be set by the ECM when the reductant injection valve circuit would not be as per the parameters set by the manufacturer.

What causes this problem with the Reductant Injection Valve Circuit Low Bank 1 Unit 2?

• Unusable reductant injection valve
• Issue of unbolted reductant injection valve control circuit
• The DEF in the reservoir might not be sufficient
• There can be distorted SCR controller/PCM or programming error

1. Engine Control Module - The solenoid might cause a short in the engine control module because of corrosion in the solenoid or the wire running from the solenoid to the ECM harness.
2. Electronic Control Unit - The ECU power management control module keeps in check the hybrid battery charging functions. If the ECU is faulty, the battery pack will not be able to properly get charged and thus, the ECU might need replacement.
3. Powertrain Control Module - A trouble with the PCM would mean that it is unable to determine the right fuel mixture and would send the car engine either more or less fuel than it requires. Now when the engine gets more, the carbon emission would increase and fuel economy would drop. In case of the opposite, the engine will choke, stutter, and might start stalling sometimes.
4. Fuel Injector - Bad fuel injectors can cause starting issues, poor idles and affected performance. Thus, the replacements are in order. Buy new fuel injectors now!
5. Exhaust Gas Recirculation Valve - If the PCM detects any fault in the vehicle’s EGR valve circuit, it will set up the check engine light so that the driver is notified about the fault. Properly check for the EGR valve faults leading to this OBD code getting stored in the system. Get the faulty EGR valve replaced or else this fault code can turn up.
6. Diesel Exhaust Fluid Pump - Faulty DEF pump can lead to increased emission and affected vehicle performance. It can also hamper the fuel economy and the power output of the vehicle. Thus, replace faulty DEF pump now!
7. Diagnostic Tool - Usually any OBD code problem requires deep insight into the problem and high grade tools in order to fix it properly. Thus, buy quality diagnostic tools form us!

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P2054 here:

Common Symptoms

• Illumination in the service engine soon light
• The NOx emissions might be more than normal

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P2054:

• Adjust the flawed PCM or programming error
• You must fix the defective electronic control unit
• It is essential to restore the flawed reductant injection valve
• Rehabilitate the defaults in the SCR controller
• Carefully adjust the faults in the reductant injection valve control circuit

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

• The P2054 error code can be diagnosed by using an OBD scanner. Then the process of diagnosis should start. The mechanic should visually inspect the reductant heater system harnesses as well as connectors. Then the mechanic has to check the wires, connectors and other electrical components and quickly replace them if he finds them to be damaged or defective. After that all the stored codes as well as freeze frame data should be retrieved.
• This information should be written down before clearing the codes and then the vehicle should be take out for a test drive unless and until the powertrain control module would enter the readiness mode or the code is reset. Now if the PCM enters readiness mode, then it would that this code is intermittent and might be very difficult to diagnose it. If this is the real case, then you should allow the conditions which have given contribution in storing this code to worsen before the correct diagnosis can be made. Carefully reset the code and then the source of vehicle information to get diagnostic flow charts, connector pin out charts, connector face views, as well as component testing procedures and specifications should be searched. This information would be very helpful in completing the next step of your diagnosis. The DVOM should be used to check the power supply to the SCR control system.
• The fuses with the circuit loaded should be inspected so that the misdiagnosis can be avoided. Now if the right power (battery voltage) and ground circuits have been located, then a scanner should be used to activate the reductant injector valve and check the output control circuit voltage. Then if the voltage is not sufficient, then it would that there are some faults in the controller or it might have faced a programming error. If the voltage output circuit is as per the parameters set by the manufacturer, then DVOM should be used to check the reductant injection valve. If the valve is not as per the specifications set by the manufacturer, then it would mean that it has a failure. It is very important to replace it. These are some of the major wiring problems that you will encounter with error code P2054. Once you have completely checked all the obvious things and still you can’t find the right solution, then you have to begin suspecting either the computer or the sensor.

Common Mistakes When Diagnosing The P2054 Code

• The mechanic might fail to inspect the wiring harness and connector thoroughly.
• Failure to confirm the powertrain control module is able to command the system on.
• Many a times the mechanic might fail to remove as well as examine the nozzle for clogging.