OBD-II code · Powertrain (generic)
P01B5 Alternative Fuel Rail Temperature Sensor Performance
Alt fuel rail temp sensor reading implausible compared to expected behavior.
Is it safe to drive with P01B5?
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 element contaminated by oil, soot or coolant
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 Rail Temp Sensor
Related codes
- P01B2Alternative Fuel Tank A Level Sensor Circuit High
- P01B3Alternative Fuel Tank A Level Sensor Circuit Intermittent/Erratic
- P01B4Alternative Fuel Rail Temperature Sensor Circuit
- P01B6Alternative Fuel Rail Temperature Sensor Circuit Low
- P01B7Alternative Fuel Rail Temperature Sensor Circuit High
- P01B8Alternative Fuel Rail Temperature Sensor Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.