The IAT signal is stuck high. IAT is typically integrated within the MAF on the 981.
SYMPTOMS
- Check-engine light
- Minor drivability/economy effects
LIKELY CAUSES
- Failed IAT element
- Wiring open
- Faulty MAF assembly
DIAGNOSIS STEPS
- Read IAT live
- Check wiring
- Replace MAF/IAT assembly
RELATED PARTS
- IAT/MAF sensor