OBD-II code · Powertrain (generic)
P01AE Alternative Fuel Tank Temperature Sensor Circuit Intermittent/Erratic
Intermittent signal from alt fuel tank temp 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 P01AE?
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 Temp Sensor, Sensor Wiring
Related codes
- P01ABAlternative Fuel Tank Temperature Sensor Range/Performance
- P01ACAlternative Fuel Tank Temperature Sensor Circuit Low
- P01ADAlternative Fuel Tank Temperature Sensor Circuit High
- P01AFAlternative Fuel Tank A Level Sensor Circuit
- P01B0Alternative Fuel Tank A Level Sensor Range/Performance
- P01B1Alternative Fuel Tank A Level Sensor Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.