dacecil

Need some help please. I have a 92 ES300 with 237k miles. I recently replaced the head gaskets. While inside the engine, I discovered that the knock sensors were badly corroded and the wires were basically rotted off. I removed them and rewired them to the best of my ability. As soon as I started the car back up, I had radio interference which I can live with. I figured I was going to have that because of the coaxial type cable connected to the knock sensors. I can put a filter in behind the radio wiring to correct the interference.

But, now I have a intermittent check engine light which codes out to be knock sensors. Both of them. I really don't want to remove the intake manifold again and replace them. They are too expensive and the car is really just beater.

So, my question is this. Can I disconnect the knock sensors from outside the intake manifold and have them send no signal to the computer? I am not worried about knocking. I use good gas and the car does not ping. The bad sensors are just making the computer think it is.

Thanks,
Dale

Nad1370

The knock sensor harness has a pigtail in it before it connect to the main harness. You can have access to this w/out taking the manifold off.
But there are no two ways around it. You have to replace the knock sensors and harness in order to get rid of the Engine light.
Good or bad knock sensors continuosly transmits frequency then ecu converts it to voltage. So you need this plugged in.

No input = check engine light.