hondaman

I bought a 01 silverado 4x4 with 5.3 128000 miles and ses light came on had it scanned and threw codes for both knock sensors,motor sounds fine any ideas i have heard water gets in there but does it normally make both go bad.any help please.

silveradok1500

I have the same thing going on. My ECM threw a PO327 code. After reading about this issue, I pulled off my intake and both knock sensor wells had water in them, and major corrosion going on. Replaced them with OEM parts, along with cable, and thought I was good to go. Now I am still getting the SES light and po327 code?? Trying to figure out what else is causing this code to come up??????

hondaman

well i tore it apart checked both knock sensor and harness sensors were bad harness was good so put in new sensors and gaskets and so far no ses light .

BabiedSilverado

How's it going, Hondaman? I've got an '01 1500 with the 5.3L and 209k miles on it. Best truck I've ever owned. But, my service engine light is on again and the OBDII indicates its a knock sensor problem as well. The mechanics are telling me that the knock sensor code is coming up because of some other unknown problem thats causing it. In the meantime, they want hundreds of $ just to diagnose it. Was wondering how you made out with replacing yours or if you found other problems since then.

hondaman

Mine is still running good no ses light guess I got lucky

country_09

if you fix the knock sensor, you're suppose to clear the codes and they shouldn't come back. If they do then you didn't do somethin right