heres my problem my 97 Z28 keeps getting SES lights
I scanned it and it said 2 codes EGR sensor and Crank shaft position sensor.
Ive replaced the EGR valve, new crankshaft position sensor, new IAT sensor. STILL getting codes after clearing them.
plugs are new, wires all good and fit .
Cleaned TB , removed and clean IAC(gummed up)
Seafoamed,checked every wire we could find for breaks etc.

Anybody got any ideas?

 

02 sensor?

 

wouldnt the scan say its an O2? I have a hand held scanner and all it says are those two egr and crank shaft positioner

 

did you check for a 5v , and ground to them ??? just because you replaced the sensor and valve does not mean you fixed the problem.

 

thats what I was thinking....

 

On the CPS, check the pigtail, they can become corroded and cause the computer to see it as a malfunction.