guenterdragon6
Skoda Karoq Engine Running Rich
Summary of the thread
A 2021 Skoda Karoq was experiencing issues with the engine running rich, leading to reduced power, a check engine light, rough running, increased fuel consumption, and jerking during acceleration. The suspected cause was a defective injection valve or injector. Suggestions included checking the air filter and oxygen sensor, as these could also contribute to the problem. Ultimately, the issue was resolved by replacing a defective injector, restoring smooth engine performance.
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4 comment(s)
guenterdragon6 (community.author)
Thanks for your quick reply. I haven't checked the oxygen sensor yet, but I replaced the air filter recently. Could it still be the oxygen sensor even if the air filter is new?
piaklein6
Yes, it's still possible for the oxygen sensor to be faulty even with a new air filter. The sensor provides feedback to the engine control unit about the oxygen levels in the exhaust. If it's sending incorrect data, it can cause the engine to run rich. I would suggest getting it checked out by a mechanic. It could also be something else affecting the catalytic converter.
guenterdragon6 (community.author)
Thanks for the input. I took it to the shop, and you were right; it was a defective injector. They replaced it, and the engine is running smoothly again. Total cost was 515€, including labor.
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SKODA
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KAROQ
piaklein6
Sounds like a rich mixture problem. I had a similar issue with my Karoq a while back. Have you checked the air filter and the oxygen sensor? They can cause these symptoms.