to all those with ECU code Familarity, need your help please, i've jus recently installed a UDP and sonn as that i get bushwhacked with ECU codes of 03,04 which i checked is KNOCK SENSOR, and code 09,05 which is CrankShaft Position Sensor (position), i need to know what is the cause for these codes and how to fix whatever is the cause for the ECU to throw these codes at me. I have read the sticky on code 03 04 for Knock sensor but 09 05 seems to be missing from the sticky. its a 1998 GXE with about 46K miles. thanks to those who care to reply with help.

 

Whenever I do work under the hood, I always seem to throw some codes. I just reset the ECU and wait to see if any of them come back. Sometimes it's just from unpluging some sensors.

 

Go out and buy a haynes manual. It's quite helpful.

 

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