Powertrain
Definition only
Lights the check engine lamp
P2AC8: Charge Air Cooler Coolant Temperature Sensor B Range/Performance
Standardized SAE J2012 code · P2Axx codes
What does P2AC8 mean?
The charge air cooler coolant temperature B signal does not match plausibility checks against related signals. Sensor drift.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Sensor characteristic drifted
- Medium Sensor mounting displaced from reference path
- Low Sensor element aged beyond calibration window
Likelihood is a general estimate across vehicles; your make and model may differ.
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P2AC8 in the community
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