ECM/PCM Power Relay Sense Circuit Open
ECM/PCM Power Relay Sense Circuit Open: the circuit is open. Likely a broken wire, disconnected connector, or failed component.
Affected components
- Ecm
- Main relay
Common causes
- High likelihood: Main relay contacts faulty
- Medium likelihood: Sense wire open
- Low likelihood: Pin pushed back out of connector body
Possible symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.