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.
The charge air cooler coolant temperature B signal does not match plausibility checks against related signals. Sensor drift.
Common causes
- high
Sensor characteristic drifted
One of the most commonly reported causes for this code — check this first.
Typical part cost: $60-280
- medium
Sensor mounting displaced from reference path
A plausible cause — test and verify before replacing parts.
Typical part cost: $60-280
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P2AC8 mean?
P2AC8 means "Charge Air Cooler Coolant Temperature Sensor B Range/Performance". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2AC8?
sensor characteristic drifted; sensor mounting displaced from reference path; sensor element aged beyond calibration window — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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