OBD-II code · Powertrain (generic)
P01A6 Alternative Fuel Rail Pressure Sensor Circuit High
Alt fuel rail pressure sensor signal voltage above expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P01A6?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire open
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Alt Fuel Rail Pressure Sensor, Sensor Wiring
Related codes
- P01A3Alternative Fuel Rail Pressure Sensor Circuit
- P01A4Alternative Fuel Rail Pressure Sensor Performance
- P01A5Alternative Fuel Rail Pressure Sensor Circuit Low
- P01A7Alternative Fuel Rail Pressure Sensor Circuit Intermittent/Erratic
- P01A8Alternative Fuel Rail/System Pressure - Too Low
- P01A9Alternative Fuel Rail/System Pressure - Too High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.