walterwagner1
Lexus RC Knock Sensor Issue
Summary of the thread
A 2023 Lexus RC with a hybrid engine is experiencing a check engine light, increased fuel consumption, and uneven idling, suspected to be due to a defective knock sensor. The initial suspicion is a faulty cable or plug connection. A similar case revealed that the issue was indeed a faulty knock sensor connection, which was resolved by professional inspection and repair. It is advised to have a workshop thoroughly inspect the knock sensor connection to confirm and resolve the issue.
Did this summary help you solve your problem?
4 comment(s)
walterwagner1 (community.author)
Yes, I inspected the wiring as best as I could. I didn't see any obvious damage, but it's difficult to get a good look at the entire length of the cable without removing other components. Was your problem definitely the knock sensor connection?
larslion5
Yes, after further investigation by a professional, it turned out to be the knock sensor connection. While there was no visible damage initially, the connection was indeed faulty. Considering the cost of the sensor itself versus the connection repair (about 95€ in my case), it’s worth having a workshop take a closer look to confirm.
walterwagner1 (community.author)
Thank you for the information. I will take your advice and schedule an appointment with a workshop to have the knock sensor connection thoroughly inspected. Hopefully, that will resolve the issue.
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
LEXUS
community_crosslink_rmh_model
RC
larslion5
I had a similar issue with my Lexus RC. The symptoms sound very familiar. In my case, the check engine light was intermittent, and I also noticed a drop in fuel efficiency. Did you check the sensor's wiring for any signs of damage or corrosion?