P0689
Electronic Control Module Power Relay Sense Circuit Low
Generic code
Computer Output Circuit
High severity
Hard repair
Free on OBD DashX
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What P0689 means
- 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
Free on OBD DashX
P0689 on OBD DashX
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