OBD II Fault Code

  • OBD II P229C

OBD-II Code Decreased engine performance is defined as a Fuel Pressure Regulator 2 Exceeded Learning Limits - Too Low

The Fuel Pressure Regulator allows the fuel system to release excessive fuel in the fuel rail back to the fuel tank. When the engine control module (PCM) determines that the Fuel Pressure Regulator is not performing properly, the PCM will set code P229C.

Decreased engine performance Symptoms

  • Decreased engine performance
  • Engine may stall
  • Increased fuel consumption

Common Problems That Trigger the P229C Code

  • Fuel pressure regulator failure
  • Fuel pump failure
  • Leaking fuel injector
  • Powertrain Control Module (PCM) failure
  • Wiring issue

Common Repairs Needed for the P229C Code

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