OBD-II code · Powertrain (generic, extended)
P2A34 AFCM Power Relay Control Circuit High
Voltage on the AFCM power relay control line is above the expected window. Wire shorted to B+ or coil open.
Is it safe to drive with P2A34?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyControl wire shorted to B+
- PossibleOpen relay coil
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Afcm Power Relay, Afcm, Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.