Powertrain
Definition only
Lights the check engine lamp
P2AAC: Diesel Fuel Presence Sensor Circuit
Standardized SAE J2012 code · P2Axx codes
What does P2AAC mean?
The ECM detects a generic fault on the diesel fuel presence sensor circuit. Reading cannot be used reliably for control.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Sensor failed
- Medium Wiring or connector fault
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2AAC on the same make and model first.
P2AAC in the community
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