Fault Code P0689
Code meaning, symptoms, possible causes, part number, and estimated cost.
P0689
ECM/PCM Power Relay Sense Circuit Low
This code indicates an abnormally low voltage in the sense circuit of the Engine Control Module (ECM) / Powertrain Control Module (PCM) power relay. This means the PCM/ECM is receiving a voltage reading that is too low from the relay.
Part Details
Part Name
PCM/ECM Power Relay
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪200 - ₪1000
Engine Location
Engine bay / Fuse box
Symptoms
- Engine cranks but does not start or stalls
- Check Engine Light on
- Hard starting
- Electrical system failures
Possible Causes
- 1Damaged wiring or short to ground in the sense circuit
- 2Faulty PCM/ECM power relay
- 3Problem with the Powertrain Control Module (PCM/ECM)
- 4Faulty fuse
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