OBD-II code · Powertrain (generic)
P01A0 Alternative Fuel Tank A Pressure Sensor Circuit Low
Alt fuel tank A pressure sensor signal voltage below 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 P01A0?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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 Tank Pressure Sensor, Sensor Wiring
Related codes
- P2A43Alternative Fuel Tank B Pressure Sensor Circuit Low
- P2A48Alternative Fuel Tank C Pressure Sensor Circuit Low
- P019DO2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 3
- P019EAlternative Fuel Tank A Pressure Sensor Circuit
- P019FAlternative Fuel Tank A Pressure Sensor Performance
- P01A1Alternative Fuel Tank A Pressure Sensor Circuit High
- P01A2Alternative Fuel Tank A Pressure Sensor Circuit Intermittent/Erratic
- P01A3Alternative Fuel Rail Pressure Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.