OBD-II code · Powertrain (generic)

P01AF Alternative Fuel Tank A Level Sensor Circuit

Generic electrical fault on alt fuel tank A level sensor.

Is it safe to drive with P01AF?

Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.

Common causes

  • Most likelyLevel sensor failed

Repair at a glance

Difficulty
Medium
DIY friendly
Best left to a mechanic
Typical labour
0.5–3 h
Emissions test
Usually unaffected
Parts involved
Alt Fuel Tank Level Sensor, Sensor Wiring

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.