Supra Knock Sensor Issue

My 2002 Toyota Supra IV with a gasoline engine is throwing me for a loop. The check engine light is on, fuel consumption has gone up noticeably, and the idle is rough. I'm getting error codes pointing to a defective knock sensor. I've checked the sensor itself, and it seems okay. I suspect the cable or plug connection... Anyone else battled this?

4 comment(s)

I had a similar issue with my Supra, although I didn't check the sensor itself. I was getting the check engine light and some funky idling. Have you checked the wiring harness for any obvious damage? Maybe a critter had a snack?

Good call on the wiring harness! I'll give it another once-over. When you had this issue, did it also affect your ignition timing or cause any noticeable engine knock beyond the rough idle? I'm trying to narrow down if it's definitely the knock sensor circuit before I throw parts at it.

Yeah, the timing felt off, like the engine was holding back. Honestly, I didn't dig too deep myself. After poking around for a bit, I just took it to a workshop. They sorted it out pretty quick.

Appreciate the insight. I double-checked the harness, and you were right, the connector was corroded. Cleaned it up, and the light's gone! Runs like a dream now. Cost me 95€ for the connector cleaning. Thanks a lot for pointing me in the right direction!

Join the discussion now: