P01AF
Alternative Fuel Tank A Level Sensor Circuit
Generic electrical fault on alt fuel tank A level sensor.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Level sensor failedCommon
Parts involved
- Alt Fuel Tank Level Sensor
- Sensor Wiring
P01AF is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.