P2AAC
Diesel Fuel Presence Sensor Circuit
The ECM detects a generic fault on the diesel fuel presence sensor circuit. Reading cannot be used reliably for control.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Sensor failedCommon
- Wiring or connector faultPossible
Parts involved
- Diesel Fuel Presence Sensor
- Wiring Harness
- ECM
P2AAC 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.