P2A6F
Alternative Fuel Rail Pressure Regulator Inlet Pressure Too High
The measured inlet pressure of the alternative fuel rail pressure regulator exceeds the calibrated maximum. Pump regulator stuck high or downstream restriction.
The measured inlet pressure of the alternative fuel rail pressure regulator exceeds the calibrated maximum. Pump regulator stuck high or downstream restriction.
Common causes
- high
Pump pressure regulator stuck high
One of the most commonly reported causes for this code — check this first.
Typical part cost: $220-1650
- medium
Restriction downstream of regulator
A plausible cause — test and verify before replacing parts.
Typical part cost: $220-1650
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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 P2A6F mean?
P2A6F means "Alternative Fuel Rail Pressure Regulator Inlet Pressure Too High". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2A6F?
pump pressure regulator stuck high; restriction downstream of regulator — 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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