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OBD II Fault Code

  • OBD II P021C

OBD-II Code Decreased engine performance is defined as a Cylinder 9 Injection Timing

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, it will set code P021C.

Decreased engine performance Symptoms

  • Decreased engine performance
  • Increased fuel consumption

Common Problems That Trigger the P021C Code

  • Fuel injector failure
  • Powertrain Control Module (PCM) failure
  • Wiring issue

Common Repairs Needed for the P021C Code

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