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OBD II Fault Code

  • OBD II P066E

    OBD-II Code Hard or no start in cold weather is defined as a Cylinder 3 Glow Plug Control Circuit Low

    The Glow Plug is used on diesel engines to preheat the cylinder before the engine is started. If the engine control module (PCM) detects the glow plug for cylinder three is not operating properly, the PCM will set code P066E.

    Hard or no start in cold weather Symptoms

    • Engine may not start
    • Hard or no start in cold weather

    Common Problems That Trigger the P066E Code

    • Glow plug control module failure
    • Glow plug failure
    • Glow plug relay failure
    • Glow plug wiring harness failure

    Common Repairs Needed for the P066E Code

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