P0253 OBD II Trouble Code Injection Pump Fuel Metering Control A Low (Cam/Rotor/Injector)

How to easily diagnose, repair, and what causes a P0253 code which indicates a low voltage condition in the A injection pump fuel metering control.

Symptoms of P0253 OBD II Trouble Code

  • Malfunction Indicator Lamp (MIL) illumination
  • Decrease in fuel economy

Common Causes of P0253 OBD II Trouble Code

  • Short to ground in the signal circuit to the FRP sensor - possible
  • Short to ground or open in the power circuit at FRP sensor - possible
  • Failed PCM - unlikely

Severity of P0253 OBD II Trouble Code

Severity in this case will be not severe. Since it is electrical failure, the PCM can compensate adequately for it.