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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Sensor zero driftedCommon
- Sensor mounting loose - bias offsetPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Alt Fuel Rail Pressure Regulator
- Alt Fuel Pump
- Afcm
P2A6A 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.