Powertrain
generic / SAE
P2511
ECM/PCM Power Relay Sense Circuit Intermittent
The sense (feedback) line that lets the ECM verify the main power relay has actually closed shows intermittent dropouts. The ECM expects to see battery voltage on this line whenever the relay is energised — short losses suggest aged contacts, vibration or chafed wiring.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 11
Possible causes
- Aged main relay contacts high
- Chafed sense wire shorting intermittently medium
- Connector with intermittent contact under vibration low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 60–400 €
- Estimated time: 0.4–1.5 h
- Component: main relay
- Component: sense wire
- MIL / check engine light
Sources
References
sae:J2012