OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P2A3E?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyAlt fuel pump output degraded
- PossibleAlt fuel injectors partially clogged
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Alt Fuel Pump, Alt Fuel Injectors, Afcm
Related codes
- P2A3BO2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 3
- P2A3CO2 Sensor Negative Current Control Circuit Low Bank 1 Sensor 3
- P2A3DO2 Sensor Negative Current Control Circuit High Bank 1 Sensor 3
- P2A3FExcessive Time to Enter Alternative Fuel Control
- P2A40Alternative Fuel System - Injector Leakage to Rail Detected
- P2A41Alternative Fuel Tank B Pressure Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.