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Lexus GS knock sensor issue

Hey, my 2018 Lexus GS with a gasoline engine is acting up. The check engine light is on, and my fuel consumption seems higher. Plus, the idling is uneven. Could this be a defective knock sensor? I checked the sensor, and the cable and plug look fine, but what else could it be?

A 2018 Lexus GS is experiencing issues with the check engine light, increased fuel consumption, and uneven idling, potentially due to a defective knock sensor. Despite the sensor, cable, and plug appearing fine, further inspection revealed the problem was indeed with the knock sensor. Repairing the defective cable or plug resolved the issues, restoring the vehicle's performance.

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4 comment(s)

Sounds familiar! I had similar issues with my old Volvo a while back – warning light, fuel efficiency tanked, and the engine was running rough. Have you checked for any obvious damage to the wiring harness near the sensor?

Wiring harness? Where exactly should I be looking for damage? Is it something obvious, or do I need to get in there with a magnifying glass?

Yeah, the harness. On the Volvo, it was chafing against the engine block. I'd give it a good look, but honestly, with those symptoms on a Lexus, it's probably worth getting it checked by someone who knows their stuff. Could save you a headache.

Thanks, I appreciate the advice! I took it to a workshop, and you were right – knock sensor was the culprit. Cable or plug was defective as predicted. Cost me 95€ to repair. Runs like new now!

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LEXUS

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