My reader just says the Knock sensor, always 1, bank 1. and does say
"circuit malfunction" My reader does not give actual number code.
I do know when light is on, car will not go into OD. I do have an older
reader that gives number code. Could use that when it happens
I had to pull over and erase as it happen as I pulled onto the freeway. Didn't want to
run at high RPM that long. Will have to wait till next time. I do have an Autozone
close, and can also put the reader that has the codes and code book in the vehicle.
Sigh. WAS a mechanic when things were simple. ;)
OK. To speed up the process, I just filled the gas tank. Got light right away.
Got two codes this time. PO325 and P1130.
I agree with your answer. But, am thinking I might as well just replace knock sensors
and the wiring harness since they are conveniently placed under intake anyway. Do
wonder why the light has not yet come on under 1/4 tank though... Any particular
strange things with pulling intake, given I am/was a mechanic? (OK, it was on
Fords ;) )
Replacing the knock sensors are a pretty good idea considering the work involved. I wouldn't advise replacing the harness, but repairing it, as the replacement part cost is really going to be too high. The only kicker to the intake manifold removal is the plenum has a couple of brackets on the back by the firewall and getting to the bolts to remove them is pretty tricky. Also, there is a ground wire right on the back between the plenum and the firewall. Other than that its pretty straightforward.