Charge Air Cooler Coolant Temperature Sensor B Circuit Intermittent/Erratic
The charge air cooler coolant temperature B sensor signal drops out or jumps intermittently. Loose connector or noisy ground.
Affected components
- Charge air cooler coolant temp sensor b
- Wiring harness
- Ecm
Common causes
- High likelihood: Sensor connector not seated
- Medium likelihood: Noisy ground reference
- Low likelihood: Connector with intermittent contact under vibration
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.