EmBe2021

Seat Leon Diesel Exhaust Temperature Sensor Problem

Hoping someone can offer some insights. My 2002 Seat Leon with a diesel engine is giving me headaches. The check engine light is on, and I've noticed a distinct drop in engine power. I also suspect my fuel consumption is higher than normal. I've scanned the car, and it's throwing a code related to the exhaust temperature sensor. I'm thinking it might be connected to the exhaust system, perhaps a leak affecting the emission control system? Anyone experienced similar temperature sensor issues?

4 comment(s)

That sounds suspiciously like the issue I had with my Leon a while back. Check engine light, sluggish performance, the whole shebang. Was your fuel consumption also up? Mine was drinking petrol like it was going out of style.

Fuel consumption has been noticeably worse, yes. How did you resolve your issue? Was it also the exhaust temperature sensor? Did you have any other symptoms? Any details would be greatly appreciated.

Yep, exhaust temperature sensor was the culprit for me too. I'd get it checked at a workshop, especially with the leak you suspect. Could save you bigger problems down the line. Good luck!

Turns out it was the exhaust temperature sensor. The garage found a small leak in the exhaust system, which they reckon caused the temperature fluctuation and fried the sensor. Sensor replacement and fixing the leak came to around 265€. Check engine light is gone, and the car seems to be running smoother. Thanks for the tip!

Join the discussion now: