Lexus GX Knock Sensor Issue

Sounds like you've pinpointed the issue well! Those knock sensors can be a real pain. Before replacing parts, have you checked the resistance of the knock sensor itself and the continuity of the wiring harness back to the ECU? A bad connection there can mimic a faulty sensor, messing with your ignition timing and causing poor performance.

Thank you for the quick reply! Regarding resistance and continuity checks, could you elaborate on the expected values or ranges I should be looking for? Also, are there specific pins on the ECU connector I should probe to verify the wiring integrity, or is a wiring diagram necessary?

Alright, so expected resistance varies, but typically you're looking at something like 100-300 kOhms across the sensor terminals. As for the ECU pins, a wiring diagram is definitely your friend here. Trying to guess can lead to serious headaches, or worse, frying something expensive. Given the symptoms and the possible bad connection, it might be worth letting a workshop tackle this one before things get frustrating!

I appreciate the insights, especially regarding the ECU pin identification. I've decided to take your advice and bring the Lexus to a trusted workshop. They confirmed the defective connection and quoted 95€ for the repair. Thank you for pointing me in the right direction to avoid more extensive troubleshooting!