Charge Air Cooler Temperature/Intake Air Temperature Correlation Bank 2
CAC temperature and IAT on bank 2 disagree at long soak. The intake air temperature sensor feeds the ECM's density calculation — a drifted reading miscalculates fuel mass and pushes mixture lean (cold reading) or rich (hot reading).
Affected components
- Cac temperature sensor
- Iat sensor
Common causes
- High likelihood: One sensor drifted
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.