Charge air temperature sensor T121
▶ How to fix
Check the charge air temperature sensor connectors and electrical cables.Measure the resistance of the charge air temperature sensor. The resistance should be approximately 2.5 kohm at 20ºC.Measure the sensor voltage supply. The voltage should be approximately 5 V when the sensor is disconnected.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Fault in the charge air temperature sensor.
Possible cause
Short circuit to earth.