OBD-II code · Powertrain (generic, extended)
P2A6B Alternative Fuel Rail Pressure Regulator Pressure Sensor Circuit Low
Voltage on the inlet pressure sensor signal line of the alternative fuel rail pressure regulator is below the expected window. Wire shorted to ground or sensor short.
Is it safe to drive with P2A6B?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- Parts involved
- Alt Fuel Rail Pressure Regulator, Alt Fuel Pump, Afcm
Related codes
- P2A68Alternative Fuel Tank C Level Sensor Circuit Intermittent/Erratic
- P2A69Alternative Fuel Rail Pressure Regulator Pressure Sensor Circuit
- P2A6AAlternative Fuel Rail Pressure Regulator Pressure Sensor Range/Performance
- P2A6CAlternative Fuel Rail Pressure Regulator Pressure Sensor Circuit High
- P2A6DAlternative Fuel Rail Pressure Regulator Pressure Sensor Circuit Intermittent/Erratic
- P2A6EAlternative Fuel Rail Pressure Regulator Inlet Pressure Too Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.