V90 Intake Air Temperature Sensor Fault

I had similar symptoms with my V90. Start by checking the sensor's wiring and connections for damage or corrosion. Also, check the sensor's readings using a diagnostic tool. What readings are you getting from the sensor?

Thanks! Didn't think about the wiring. I'll check it tomorrow. What should the intake air temperature be roughly when the engine is cold?

If the engine is cold, the intake air temperature reading should be close to the ambient air temperature. A big difference, especially if it's very high or low, suggests a faulty sensor. Given the symptoms and error code, if the wiring's okay, best to take it to a workshop.

Just to let you know, you were right! Wiring was fine. Shop confirmed the intake air temperature sensor was defective. Replaced it for 155€ and now it runs like new. Thanks for the advice!