P0684

2017-10-10

Description:

  • The fault code P0684 indicates that there is a problem in communication between Glowplug control module and ECM.

Possible Symptoms:

  • Difficulty in starting the engine

  • Illuminated check engine light

  • Poor engine performance

  • Rough idle or stalling.

Possible Causes:

  • Faulty glow plug control module

  • Damaged or corroded wiring in the circuit between Glow plug module and ECM

  • Failed engine control module (ECM)

Related Parts:

  • Glow Plug: A glowplug is a heating device that helps to start diesel engines. This car's glow plug has a problem which may cause hesitation while starting the car or the car not starting at all

Possible Solutions:

  • Replace the glow plug control module

  • Inspect and repair any damaged or corroded wiring in the circuit between these two modules.

  • Replace the engine control module (ECM) if necessary

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