P2A6A
Alternative Fuel Rail Pressure Regulator Pressure Sensor Range/Performance
The inlet pressure signal of the alternative fuel rail pressure regulator does not match plausibility checks against tank pressure and pump duty. Sensor drift.
The inlet pressure signal of the alternative fuel rail pressure regulator does not match plausibility checks against tank pressure and pump duty. Sensor drift.
Common causes
- high
Sensor zero drifted
One of the most commonly reported causes for this code — check this first.
Typical part cost: $220-1650
- medium
Sensor mounting loose - bias offset
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 P2A6A mean?
P2A6A means "Alternative Fuel Rail Pressure Regulator Pressure Sensor Range/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 P2A6A?
sensor zero drifted; sensor mounting loose - bias offset; sensor element aged beyond calibration window — 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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