liamwilson1

Mercedes M Klasse Diesel Intake Air Temperature Sensor Issue

My 2013 Mercedes M Klasse diesel is acting up. The check engine light is on, and it feels like it's lost half its power. A diagnostic tool shows a fault with the intake air temperature sensor. The engine is running rough and the diagnostic tool is showing weird temperature readings. Could a faulty car sensor really cause all this? Has anyone else had this happen?

4 comment(s)

Yep, sounds familiar. I had a similar issue with my old BMW 3 series. Check engine light, reduced power... It turned out to be the same intake air temperature sensor. A diagnostic tool pointed right to it. Is the air temperature reading totally off?

The temperature reading seems way off, like -40 degrees when it's clearly not that cold outside. Was your car running rough too? How did you figure out it was definitely the air temperature sensor and not something else?

Yeah, rough running was definitely part of it. The temperature reading being that far off pretty much confirms it. With mine, the reading was just crazy. The simplest thing is probably just replace the intake air temperature sensor. Otherwise take it to a workshop, they can check it quickly.

I replaced the intake air temperature sensor and that seems to have fixed everything. The check engine light is off, power is back to normal, and the engine runs smoothly. The whole repair including the car sensor came to around 155€. I appreciate the help!

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