P2A8A
Alternative Fuel Pump C Compression Stroke Valve Control Circuit High
The control circuit of the compression stroke valve in alternative fuel pump C reports a control circuit high condition. Pump compression stroke cannot be commanded as expected.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Common causes
Ordered by how often each turns out to be the cause.
- Control wire shorted to B+Common
- Open valve coilPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Alt Fuel Pump C Compression Stroke Valve
- Wiring Harness
- Afcm
P2A8A 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.