P2AC8
Charge Air Cooler Coolant Temperature Sensor B Range/Performance
The charge air cooler coolant temperature B signal does not match plausibility checks against related signals. Sensor drift.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Sensor characteristic driftedCommon
- Sensor mounting displaced from reference pathPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Charge Air Cooler Coolant Temp Sensor B
- Wiring Harness
- ECM
P2AC8 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.