Insignia Erratic Intake Air Temperature

Interesting. I had something similar happen with my Insignia: reduced power and a rough idle. Did you check the temperature reading from the sensor itself? Is it giving you reasonable air temperature, or is it stuck at a weird value? That sensor can cause havoc if it's giving the ECU bad information. I wonder if others have seen this particular intake air temperature sensor issue too?

Thanks. I did observe the temperature reading using the diagnostic tool. The value seemed implausible, fluctuating erratically even when the engine temperature was stable. Was your experience identical, particularly with the erratic temperature readings? Did replacing the sensor resolve your problem completely, or were there other factors involved?

Yes, the erratic readings are what I saw as well before the engine warning light came on all the time. It was jumping all over the place, completely nonsensical. It definitely sounds like a faulty sensor to me. Given that your diagnostic tool is pointing to it, and you're seeing the same symptoms, I'd wager it's the culprit. I would suggest going to the nearest workshop if you want to fix this, or do you want to change the sensor yourself?

Thanks so much for confirming my suspicions and sharing your experience. It appears a visit to the workshop is indeed necessary. The repair including the sensor replacement cost me 155€. I appreciate your help!