Air temperature sensor ( T126 / T4000 )
▶ How to fix
If there other error codes for the inlet air temperature sensor (T126/ T4000 ) exist, fix those first. Check the connectors and electrical wiring. Check that the mass air flow / temperature sensor is installed correctly Check the air inlet temperature sensor 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
The engine power can be affected. Gas engines: torque limitation.
Diagnostic depth
Detection
There is a fault with the air inlet temperature sensor ( T126 / T4000)
Possible cause
The air inlet temperature sensor (T126/T4000) may be broken or tampered.