OBD II Fault Code

  • OBD II P023F

OBD-II Code Decreased engine performance is defined as a Fuel Pump Secondary Circuit/Open

The Fuel Pump enables the transfer of fuel from the fuel tank to the fuel injectors in the engine. The Fuel Pump is controlled by the engine computer (PCM) or the Fuel Pump Control Module (most newer vehicles). When the Ignition is turned on, the PCM or Fuel Pump Control Module will activate the fuel pump. If the PCM detects an incorrect signal to or from the fuel pump, it will set code P023F.

Decreased engine performance Symptoms

  • Decreased engine performance
  • Engine may not start

Common Problems That Trigger the P023F Code

  • Fuel pump failure
  • Fuel pump relay failure
  • Powertrain Control Module (PCM) failure
  • Wiring issue

Common Repairs Needed for the P023F Code

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