Code result
P2AC8
Charge Air Cooler Coolant Temperature Sensor B Range/Performance
Moderate severity
What it means
The charge air cooler coolant temperature B signal does not match plausibility checks against related signals. Sensor drift.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Sensor characteristic drifted
highOne of the most commonly reported causes for this code — check this first.
Sensor mounting displaced from reference path
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
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