Lexus LC Knock Sensor Defect

I have a 2021 Lexus LC with a gasoline engine, and the check engine light keeps coming on. I've also noticed my fuel consumption is higher than usual, and the engine idles unevenly. I scanned it and it's showing a defective knock sensor. Could it be a simple fix like a bad connection? With 201071 km on the clock I was expecting a bit more!

4 comment(s)

I also have a Lexus LC, though I'm not sure about the year right now. A similar thing happened to me a while back – check engine light and all. Is your car's performance particularly poor when accelerating? If so, it could be related. I'd check the sensor's cable and plug connection as a first step, maybe even try cleaning them.

Yes, I have experienced a slight stutter when accelerating uphill. You mention cleaning the connections... did that solve the problem for you? I'm trying to avoid a huge repair bill if I can. Could it really be a simple fix?

Cleaning the connections didn't completely solve it, but it did improve things temporarily. Honestly, given the symptoms and the mileage, and considering you already know where the problem lies, I would book an appointment with a trusted workshop. In my case, a defective cable was the cause and after replacing it, my car was good to go

I appreciate the advice! I've booked it into a workshop. Turns out it was indeed a defective cable, just as suspected! Repair cost was 95€, very reasonable. Thanks again!

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