OBD-II code · Powertrain (generic)
P01A2 Alternative Fuel Tank A Pressure Sensor Circuit Intermittent/Erratic
Intermittent signal from alt fuel tank A pressure sensor. 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 P01A2?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyConnector loose or corroded
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Alt Fuel Tank Pressure Sensor, Sensor Wiring
Related codes
- P2A45Alternative Fuel Tank B Pressure Sensor Circuit Intermittent/Erratic
- P2A4AAlternative Fuel Tank C Pressure Sensor Circuit Intermittent/Erratic
- P019FAlternative Fuel Tank A Pressure Sensor Performance
- P01A0Alternative Fuel Tank A Pressure Sensor Circuit Low
- P01A1Alternative Fuel Tank A Pressure Sensor Circuit High
- P01A3Alternative Fuel Rail Pressure Sensor Circuit
- P01A4Alternative Fuel Rail Pressure Sensor Performance
- P01A5Alternative Fuel Rail Pressure Sensor Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.