This was SO cool......and saved me huge $$$$ to pass inspection in BC, Canada. Replacing the knock sensors is a $2,000 job here.
I failed the first Air Care with a P0330 alarm.
Knock sensor 2 was not dead but really doing weird things. I could take the battery connection off, and then put it back on and drive for hours.... no alarm. However, every time I turned it off for 2 hours, when I started it, I got an alarm to check engine and the code was always P0330. Also, it would not clear the catalyst or evaps monitors???? not sure how this was connected to the knock sensor????
So I can pass Air Care with one monitor not clear.......but not two monitors not clear.
So I cut the wire for knock sensor 2 (remove glove box, 4 Phillips screws and 1 bolt on 2001 Camry LE, V6, 2 knock sensor inputs are on R11).
Wiring is here for my 2001 Camry:
So the KNKL and KNKR are connector E11, pins 27 and 28. They have clear insulation and different than all the other wires in that connector...seem to be a thicker gauge wire or thicker insulation.
I cut the wire going into pin 28 about 2 inches from connector R11....knock sensor 2 and the computer started behaving like it should.....if I disconnect the battery to reset the computer, and then reconnect the battery, start the car and drive, I would get the alarm for no knock sensor 2 within 1 km.
Great....finally something working like it should. This is what should happen when there is no knock sensor connected!!!!
Then I spliced the wire the was connected to E11, pin 28 (the 2 inches mentioned above) to the wire from knock sensor 1 going to pin 27 of E11. So essentially the knock sensor 1 was feeding E11, pin 27 and 28 from the same sensor with paralllel wiring.
It worked!!! No more alarms. Also catalyst monitor ran immediately and I was through Air Care in 15 minutes!!!
The bad part from a moral or ethical perspective is that my emissions did not change a bit....same as they were for the last two years and will be for the next two years! All I did was rewire some computer signals. Shows what a useless waste of money most of these AirCare inspection places are!