swerks

Im getting a CEL for knock sensor signal, my engine seems to be running fine. what does this all mean? should I just replace my sensor. what am I risking if I ignore it for awhile?????

toyota_mdt_tech

Big chore, assuming your sig line is correct, yours will be under the intake manifold. Dont even think of doing it without replacing the wire also (short pigtail). Its almost alwasy the connector (corrosion) and sometimes the wire in the harness, but never seen a bad knock sensor yet.

swerks

what happens if I dont fix it ??????

dcg9381

Retarded timing.. How retarded isn't likely known.
Less power for sure, worse mileage.. Very retarded timing = high EGTs, but it depends on how much the ECU is allowed to back the timing down.

swerks

Can I just replace the wire??? I only get the CEL very intermittantly. I reset and it takes days and sometimes weeks before the CEL returns.

dcg9381

S, If you had a 22R series with a damaged wire / connection - I'd say yes.. I don't know what the particular problem is with the V6, other than I know it's a PITA to get to...

swerks

Sorry, this is for my 86 turbo I should have mentioned that.

dcg9381

So is your wire bad? Is it disconnected at the connector?
You can just replace the wire - but it may be a shielded wire (like coax) - let me know and report back.

swerks

Ok I need help! I thought I new where this sensor was at but I cant seem to find it ???? Is it near the distributer??? To top it all off while investigating I found a large tear in my CV boot grease everywhere!!!

Team420

it is under the intake, you have to take the upper plenum off then remove the manifold, it will be right there, do yourself a favor and replace the sensor too, i made the mistake of not getting the sensor(just did the wire), and now after all that work i still get the same code!! The first time you get into it, it will b a apain in the butt, and prob take several hours, but after you figure out all the shortcuts it shouldnt take more than 4-5 hrs...goodluck

dcg9381

Steve has a 22RTE. It's 9:30 relative to the oil filter.