OBD II Fault Code

  • OBD II P02F9

OBD-II Code Decreased engine performance is defined as a Cylinder 12 Injector Circuit Range/Performance

The engine control module (PCM) has special transistors called "drivers" to turn the Fuel Injectors on and off in the Fuel Injection System. If the PCM cannot control the fuel injector for cylinder number 12, it will set code P02F9.

Decreased engine performance Symptoms

  • Decreased engine performance
  • Increased fuel consumption

Common Problems That Trigger the P02F9 Code

  • Fuel injection control module (FICM) failure
  • Fuel injector failure
  • Wiring issue

Common Repairs Needed for the P02F9 Code

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