OBD II Fault Code

  • OBD II P0149

OBD-II Code Decreased engine performance is defined as a Fuel Timing Error

The engine control module (PCM) uses a Fuel Rail Pressure Sensor to determine the amount of fuel going to the injectors. If the PCM does not see that the commanded pressure is equal to the actual pressure, the PCM will set code P0149.

Decreased engine performance Symptoms

  • Decreased engine performance
  • Increased fuel consumption

Common Problems That Trigger the P0149 Code

  • Air in the fuel system
  • Fuel pump failure
  • Injection pump timing is out of adjustment
  • Leaking fuel lines

Common Repairs Needed for the P0149 Code

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