Charge air temperature sensor T121
â–¶ How to fix
Read off the charge air temperature sensor reading. When the engine is subject to load the temperature should rise.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The charge air temperature sensor reading is constant despite varying operating conditions.
Possible cause
The charge air temperature sensor has locked itself on one value.