I got a CEL, pulled the codes and got 0304 (knock sensor) and 1005 (EGRC Solenoid Valve). I replaced the EGRC solenoid valve first to see if the knock sensor code would go away with it.

After the replacement, I cleared the CEL and began driving. I drove for only a few miles when the CEL came back with the same exact codes as before. Correct me if I'm wrong but the knock sensor alone shouldn't cause a CEL. And I replaced the EGRC solenoid valve, so what gives with the CEL???

I'm lost, don't know what the next move should be before I take it to the mechanic. Can anyone advise? Thanks.

 

ummm.....replace the knock sensor maybe since thats what code you are getting.

 

check for codes again..most likely something else..since KS itself won't trip CEL.

 

The knock sensor has no effect on the CEL so changing that or not changing that will not clear a CEL.

The only other code besides the knock sensor is the EGRC solenoid valve which was replaced with a brand new one from the dealership. The CEL should clear but its not and there are no other codes besides these two.