Code 42 EST Problem 1991 R1500
I was messing around with the distributor And unplugged one set of wires out of the back of that ICM and tried to start it and nothing happened so I plugged it back in. I removed the other plug-in on the I CM and tried to start it and then nothing as well. After that it started showing a code 42. Since then I have replaced the Distributor. I ran diagnostics using this that I found on the Internet:
http://www.fieros.de/en/v6help/code42.html
I have 500 ohms when testing the 423 wires
It led me to the ICM witch I replaced and still shows code 42.
I had the test light with the 424 tan/black wire lighting up with the 12v test light.
any ideas?
http://www.fieros.de/en/v6help/code42.html
I have 500 ohms when testing the 423 wires
It led me to the ICM witch I replaced and still shows code 42.
I had the test light with the 424 tan/black wire lighting up with the 12v test light.
any ideas?
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Peter M
Silverado, Sierra & Fullsize Pick-ups
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Oct 3, 2010 10:25 PM





