Powertrain
generic / SAE
P2A37
AFCM Power Relay Sense Circuit High
The sense feedback voltage from the AFCM power relay is above the expected window. Indicates relay output is energised when the relay should be off, or wire shorted to B+.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / 37
Possible causes
- Relay contact stuck closed high
- Feedback wire shorted to B+ medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–600 €
- Estimated time: 0.5–3 h
- Component: afcm power relay
- Component: afcm
- Component: wiring harness
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012