P2A0F
Fuel Supply Heater Performance
The fuel supply heater does not raise fuel temperature within the calibrated time window. Common in diesel and biofuel installations to prevent paraffin or fat crystallisation in cold weather.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Heater element aged - low outputCommon
- Supply voltage low under loadPossible
Parts involved
- Fuel Supply Heater
- Fuel Temperature Sensor
P2A0F 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.