P2A3E
Alternative Fuel Delivery Error
The AFCM detects that alternative fuel delivery to the engine deviates from the commanded amount. Pump output, valve actuation, or injector flow does not match expectations.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Alt fuel pump output degradedCommon
- Alt fuel injectors partially cloggedPossible
Parts involved
- Alt Fuel Pump
- Alt Fuel Injectors
- Afcm
P2A3E 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.