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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Control wire shorted to B+Common
- Open relay coilPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Afcm Power Relay
- Afcm
- Wiring Harness
P2A34 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.