Error Code P0252: What It Means & What To Do?

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Is the car engine not performing at par with the expectations? Do you notice affected fuel economy, delayed throttle response and Check Engine Light illuminated on the dashboard? This can be an indication of the problem the fuel delivery system of the vehicle, resulting in OBD code P0252 getting stored in the Powertrain Control Module (PCM).

OBD code P0252 can be set due to mechanical (typically EVAP system) or electrical (FRP circuit sensor) issues. Thus it is important not to overlook the malfunction of these components. The PCM detects the amount of fuel that is needed to put into the engine. Whenever the PCM finds that the input does not match the normal operating condition, it sets the OBD code P0252 in the PCM.

OBD Code P0252 means Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector)

What causes the problem of Injection Pump Fuel Metering Control A Range/Performance?

• Dirty or clogged fuel filter
• Defective fuel pump
• Open or shorted circuits and electrical connectors
• Faulty fuel control actuator
• Faulty Powertrain Control Module

1. Fuel Injection Pump - If the injection pump if faulty, the engine will not receive the right amount of fuel and will cause performance issues. Thus, replace damaged injection pump now!
2. Engine Control Module - ECM can also store wrong OBD code and might require reprogramming or complete replacement. Buy new components form us!
3. Fuel Pump Relay - Check for faulty fuel pump relay and replace if needed. Buy new parts from us.
4. Fuel Valve - Faulty valve will affect the quantity of fuel entering the engine and thus the performance. Replace now!
5. Diagnostic Tools - Use quality diagnostic tools to solve OBD code P0252 error. But best tools form us today
   

Symptoms associated with a code of this type may be as minor as only a stored code and/or illuminated service engine soon lamp to as severe as a hard or no-start condition, excessive smoke from the exhaust, engine misfire, or engine hesitation especially upon acceleration.

Common Symptoms

• The Check Engine Light will be illuminated and the code is set in ECM memory as a fault.
• The engine may run too lean or too rich depending on the fuel valve failed position.
• The engine may have reduced engine power and rough running conditions.

Replacing the following components may lead to solving of OBD code P0252 error;

• Replace the fuel injection pump
• Inspect fuel pump and fuel pump relay
• Remove and replace fuel pump if faulty
• Inspect car for any signs of leakage
• Clear Check Engine light codes
• Perform basic safety inspection
• Test drive car
• Clear codes and road test to verify the code does not return
• Replace the fuel filter and contaminated fuel before the injection pump is replaced

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Following are the diagnostic steps:

• Make use of quality diagnostic tools like OBD-II scanner, DVOM, and automobile stethoscope to treat P0252 error code.
• First step in to inspect for the faulty wiring and connectors that may be damaged, broken or corroded and replace them immediately.
• PCM used other input signals from various engine sensors to develop a fuel delivery strategy. As voltage from the PCM gets increased, the fuel pressure regulator actuator allows pressure from the fuel pump to build and as voltage from the PCM is decreased, fuel pressure gets restricted.
• Retest the system after repairs are completed to ensure that the OBD code doesn’t reappear. If all system wiring, connectors, and components appear to be in normal working order, connect the scanner to the diagnostic connector and record all stored codes and freeze frame data.
• Check for the faults in the fuel pump, and the fuel injection system for any possible leaks and the thus need replacement as required. Also check for damaged or clogged fuel filters and replace them if needed.
• If everything checks out to be ok, suspect for the problem with the PCM and thus replace or repair accordingly.

Common Mistakes When Diagnosing The P0252 Code

Never skip the diagnostic steps and follow the order provided properly or otherwise can lead to misdiagnosis and unnecessary repairs and costs, which could have been avoided. Also check for the following parts for errors or faults;

• Damaged or contaminated spark plug
• Fuel pressure sensor failure
• Exhaust leakages
• Fuel injector failure
• Fuel pump failure
• Internal engine failure
• Powertrain Control Module (PCM) software needs to be updated
• The fuel not meeting the manufacturer's requirements