P0252 Fault Code

P0252 OBD-II Trouble Code Short Description

Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector)

What does trouble code P0252 mean?

The P0252 fault code is related to the fuel injection pump and indicates a problem with the fuel metering control. This means that the fuel injection system is not working accurately, resulting in improper combustion, engine misfire, reduced power, and various other problems.

Possible causes of this fault code can include faulty injectors, a malfunctioning camshaft position sensor, a damaged fuel pump, or a problem with the fuel system's wiring or connections. To diagnose and fix the issue, a qualified mechanic will need to perform a thorough inspection and testing of the fuel system, including components such as the fuel pump and injectors.

Once the problem is identified, repairs may involve replacing faulty parts, repairing damaged wiring or connections, or cleaning and adjusting the fuel pump or injectors. It is important to address the underlying issue promptly to prevent further damage to the engine and ensure safe and reliable vehicle operation.


What are the symptoms of the P0252 code?

Here are the symptoms that could be associated with the P0252 fault code in cars:

  • The vehicle may start poorly or not start at all
  • The engine may misfire or hesitate during acceleration
  • Reduced engine power and acceleration
  • The vehicle may experience a decrease in fuel efficiency
  • The engine may produce excessive smoke from the exhaust
  • The Check Engine Light (CEL) may illuminate on the dashboard


What causes the P0252 code?

The P0252 fault code usually occurs when there is an issue with the fuel injection system. Specifically, there may be a problem with the injection pump's fuel metering control. This can be caused by a variety of issues, including a faulty camshaft or injector, worn-out rotor or pump parts, or issues with the fuel pressure or delivery. It is important to address this issue promptly as it can lead to reduced engine performance and potentially cause more serious engine problems in the future.

Possible Solutions

How to fix P0252?

Here are some possible steps to fix the P0252 fault code on cars:

  1. Inspect the injection pump fuel metering control A and check for any signs of damage or wear. Replace any faulty parts if necessary.

  2. Check the camshaft position sensor and rotor for any signs of wear or damage. Replace any faulty parts if necessary.

  3. Inspect the fuel injectors and check for any signs of clogging or damage. Clean or replace any faulty injectors if necessary.

  4. Check the fuel pressure and fuel system for any leaks or issues. Repair any leaks or issues as necessary.

  5. Reset the fault code using an OBD scanner. If the fault code recurs, further diagnosis may be necessary to identify the underlying issue.

It is recommended to seek professional assistance and guidance to fix the P0252 fault code on cars as it may involve complex repair procedures and may require specialized tools and equipment.