OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P2AC8?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor characteristic drifted
- PossibleSensor mounting displaced from reference path
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Charge Air Cooler Coolant Temp Sensor B, Wiring Harness, Ecm
Related codes
- P2AC5Intake Air O2 Sensor Reference Voltage Circuit Low Bank 2
- P2AC6Intake Air O2 Sensor Reference Voltage Circuit High Bank 2
- P2AC7Charge Air Cooler Coolant Temperature Sensor B Circuit
- P2AC9Charge Air Cooler Coolant Temperature Sensor B Circuit Low
- P2ACACharge Air Cooler Coolant Temperature Sensor B Circuit High
- P2ACBCharge Air Cooler Coolant Temperature Sensor B Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.