hannesfrank85
Ford Flex knock sensor connection
Summary of the thread
A 2012 Ford Flex is experiencing issues such as a check engine light, increased fuel consumption, and rough idling, leading to suspicions of a faulty knock sensor or its connections. The symptoms align with knock sensor problems, but the possibility of defective cable and plug connections is also considered. After focusing on the connections and receiving advice, the issue is confirmed to be with the knock sensor connection, which is resolved by a professional repair.
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4 comment(s)
hannesfrank85 (community.author)
Good point. I haven't actually put a multimeter on the sensor itself yet – mostly focused on the connections 'cause they looked a little dodgy. What kind of readings should I be looking for, generally speaking, to confirm a dead sensor? Or is it even worth digging that deep before just swapping it?
julia_johnson21
Without the proper diagnostic tools, getting precise readings can be tough. Given you've already got suspicions about the wiring and the symptoms are persistent, and if you lack the tools, I'd say bite the bullet and get it checked by a pro. Could save you some headaches in the long run.
hannesfrank85 (community.author)
Yep, you were right. Bit the bullet, took it to the shop. Turns out it WAS the knock sensor connection. 95€ later, all fixed. Thanks for the reality check!
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FORD
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FLEX
julia_johnson21
Hmm, knock sensor issues can be tricky. You're right, the symptoms line up, but have you actually tested the sensor itself? Or just visually inspected the wiring? Could be something else triggering those symptoms too, you know. Is the engine pinging or knocking audibly?