johnnacht8
Seat Formentor Oxygen Sensor Issue
Summary of the thread
A 2023 Seat Formentor with a gasoline engine experienced a check engine light and increased fuel consumption, indicating a potential oxygen sensor issue. The problem was suspected to be caused by a faulty cable or plug connection. After inspection, it was confirmed that the cable connection was indeed faulty, leading to the replacement of the oxygen sensor, which resolved the issue and turned off the check engine light.
Did this summary help you solve your problem?
4 comment(s)
johnnacht8 (community.author)
When you had the issue, was the bad cable obvious, or did you need special tools to find it? I'm trying to figure out how much work this will be.
gerhard_blitz9
In my case, the cable looked fine, but there was corrosion inside the connector. It's like a leaky faucet: the problem isn't obvious, but the effects are. Given the mileage and the error code, I'd suggest a qualified workshop for a full diagnosis.
johnnacht8 (community.author)
It was the O2 sensor. The cable connection was faulty. I replaced it for 95€. The check engine light is off, and I expect my fuel efficiency to improve. Thanks for the help.
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
SEAT
community_crosslink_rmh_model
FORMENTOR
gerhard_blitz9
Your situation with the Seat Formentor is similar to one I had before. The check engine light and reduced fuel efficiency suggest a bad oxygen sensor. The engine is trying to tell you it's not breathing right. The error code reinforces this. Have you checked the O2 sensor's cable and plug connection for damage or corrosion?