P0689

2017-10-10

Description:

  • The fault code P0689 indicates an issue with the power relay sense circuit. This circuit is responsible for sending a signal to the ECM/PCM indicating the proper functioning of the power relay. A high voltage reading on this circuit suggests that there may be an electrical issue present.

Possible Symptoms:

  • Illuminated check engine light

  • Poor or erratic engine performance

  • Engine may not start or may stall unexpectedly

  • Issues with power accessories or systems (such as the power windows or air conditioning)

Possible Causes:

  • Faulty power relay

  • Damaged or corroded wiring or connections

  • Failed ECM/PCM

  • Faulty power relay sense circuit

Related Parts:

  • Engine Control Module (ECM): ECM is the part of the car computer that controls the engine system and performance. Problems lead to poor fuel economy, engine stalling & unwanted engine vibrations

Possible Solutions:

  • Replace the power relay

  • Check and repair any damaged or corroded wiring or connections

  • Replace the ECM/PCM if necessary

  • Repair or replace the power relay sense circuit as needed

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