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P0002 DTC Fuel Volume Regulator Circuit|Smart Servicing Centre

P0002 OBD-II Fault Code: Fuel Volume Regulator Control Circuit Range


P0002 trouble code definition


The P0002 code is assigned to the circuit that is connected to your fuel pressure regulator. It can also refer to other codes, e.g. E.g; P0001, P0003 or P0004.


What does P0002 code means?

P0002 is a generic OBD-II code that indicates a problem with reading engine control module (ECM) signals from your fuel pressure regulator on your fuel rail mounted on the engine.

The ECM regulates the fuel pressure from your fuel pump that flows to your engine via this circuit and receives information about your actual fuel pressure. If the computer detects a pressure that is not sent to the fuel pump, it sets a Check Engine Light. The code affects fuel consumption and may damage the engine.  


What causes the P0002 code?

The range / performance code of the fuel quantity regulator can have several causes:


  • Plug removed from fuel regulator.
  • Possible corrosion on the sensor connector.
  • Sensor wiring to ECM might be damaged.
  • Leaking or defective fuel pressure regulator.
  • Fuel pump damaged.
  • The ECM is damaged.


What are the symptoms of the P0002 code?


The P0002 code generates a Check Engine Light on the dashboard / dash and probably has the following effects:

  • Your engine power while driving.
  • Possible stagnation while driving.
  • May cause the exhaust to emit black or white smoke.
  • Fuel consumption is affected.
  • Catalytic Converter might be damaged.  


What repairs can fix the P0002 code?


The most common ways to repair the P0002 code are as follows:


  • Connect a professional scan tool. Make sure the code is there.
  • Check all other error codes. Clear the error codes to see which codes return.
  • Analyse the diagnostic tester data from the ECM.
  • Test the vehicle on the road while analysing the ECM diagnostic tester data.
  • Check that the P0002 code is returned.
  • Check all of the above. (Wiring, leaks, pressures, voltages, etc.)

Also diagnose the problem with the above device if the problem is present. Sensor signals should be analysed to determine where the problem is. If the signals are OK, we should go to the wiring, computer, or fuel system.

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