Air temperature sensor ( T126 / T4000 )
▶ How to fix
Check the air inlet temperature sensor, its connectors and wiring. Note Always perform a reset of the adaption values of the mass air flow sensor if the mass air flow sensor is replaced, or if a leak in the air intake system have been fixed
What you'll see
No driver-visible symptom recorded.
System reaction
Engine performance might be affected.
Diagnostic depth
Detection
The voltage in the circuit has been higher than allowed
Possible cause
Short circuit to battery voltage or open circuit (T126 / T4000 )