emilschmitz1
Seat Altea Diesel Performance Problems
4 comment(s)
emilschmitz1 (Author)
I did check the air filter, it looked okay. You mention a diagnostic scan - did you get one done? And was it definitely the mass air flow sensor that was causing your issues? I'm trying to avoid throwing money at it if possible.
lisa_klein7
Yes, I ran a diagnostic scan, and it pointed directly to the mass air flow sensor failure. Given your symptoms – higher fuel consumption, stalling, check engine light, smoke, and performance decline – a faulty MAF sensor is the most probable cause. It is definitely worth getting it checked at a workshop.
emilschmitz1 (Author)
Big thanks for your help! I took it to a local mechanic, and you were spot on. It was indeed the mass air flow sensor. They replaced it, and the car is running smoothly again. Total cost was 365€, which included the sensor and labor. Really appreciate your insight!
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lisa_klein7
That sounds very familiar. I had similar issues with my Altea – though I have the petrol version. Higher fuel consumption, and occasional stalling at idle. The CEL lit up too. Have you checked your air filter? A clogged filter can sometimes mimic mass air flow sensor problems. A diagnostic scan should confirm the sensor is the issue. When the MAF malfunctions, the ECU receives incorrect data, leading to an improper air-fuel mixture. This can cause a performance decline and affect fuel economy.