P2A8F
Alternative Fuel Pump B Performance
The AFCM detects that alternative fuel pump B does not produce the expected pressure or flow for the commanded duty. Pump aging, internal leakage, or supply restriction.
The AFCM detects that alternative fuel pump B does not produce the expected pressure or flow for the commanded duty. Pump aging, internal leakage, or supply restriction.
Common causes
- high
Pump internal wear reduces output
One of the most commonly reported causes for this code — check this first.
Typical part cost: $330-2200
- medium
Fuel filter clogged
A plausible cause — test and verify before replacing parts.
Typical part cost: $330-2200
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P2A8F mean?
P2A8F means "Alternative Fuel Pump B Performance". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2A8F?
pump internal wear reduces output; fuel filter clogged — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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