MBVette

ok over the last couple days my SES light has periodically came on and off. So here are the codes I pulled, can you guys give me a hand with these.

I got code 12 and code 43.

Thanks in advance.

Lone Ranger

ECM codes page on C4 site:
http://www.c4vettes.com/ecm.htm

MBVette

well on that page there is no listing for code 12.

Code 43 is a knock sensor, how do I know if this is just a false reading or a bad knock sensor?

nsimmons

code 12 means diagnostic mode is working..it will flash first, then the error codes, for the knock sensor, check the harness at the sensor and sensor itself, if it was flashing maybe the wire is loose

Ramrod92

Scott, your 92 has 2 knock sensors located on either side of the block just above the sides of the oil pan. I would check the connections first. :cheers:

MBVette

thanks guys, Im going to be changing the oil next weekend, so I will look at the wires then.

Thanks for the help.

ittlfly

You need a DVM to check the voltage to the knock sensors. If there is nothing obvious with the connections, then you'll have to check the vlts. / ground on the circuit. Send me an email and i'll give you the procedure.