OBD-II code · Powertrain (generic)
P01AB Alternative Fuel Tank Temperature Sensor Range/Performance
Alt fuel tank temp sensor reading implausible.
Is it safe to drive with P01AB?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor reading drifted
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
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
Related codes
- P01A8Alternative Fuel Rail/System Pressure - Too Low
- P01A9Alternative Fuel Rail/System Pressure - Too High
- P01AAAlternative Fuel Tank Temperature Sensor Circuit
- P01ACAlternative Fuel Tank Temperature Sensor Circuit Low
- P01ADAlternative Fuel Tank Temperature Sensor Circuit High
- P01AEAlternative Fuel Tank Temperature Sensor Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.