So I have a 2006 chevy silverado and it is throwing a P0332, P2A01 and P2A04 codes, from what I found in the Trouble codes sticky is that it is a rear knock and a B1S2 O2 sensor issue. It will only throw the codes on start up, if I clear them out of the computer it will not throw them again until I shut the truck off and start it back up again. I did this on a trip from Midland to Fort Worth, reset the codes before I left. It never threw a code until I reached Abilene and stopped to refuel (about 150 miles) reset it again in Abilene and drove on into to DFW (about anoth 150 miles and it never threw the code again until I shut the truck off.

Having said all that I am concerned that the sensors might not actually be bad and replacing them will not solve the problem, and those sensors are not cheap. Can anyone tell me where all of the ground cables for this truck are located and how many grounds should be at each point?

I had an issue with water getting into the computer connections and corroding the terminals so I rewired all of the pins that were corroded. I used new pins from a spare harness I had, soldiered all the connections, shrink wrapped all of the connections, and wired them one at a time to make sure the wiring was in the correct place. Once all of that was done it went from throwing all kinds of wired codes to throwing a few codes. last week I found the ground wire on the passenger rear of the motor worn in two so I fixed it (again soldiering and shrink wrapping everything.), this corrected all but the above three mentioned codes.

 

Anyone??