The only info I find for this code indicates that the SES light is not working or burnt out....however, my SES is on and this is the only code that DataMaster is showing.
The light eventually went off and I was able to clear the code in DataMaster...it would not clear when the light was illuminated.

This is on the '95 PCM in the LT4 truck. Any ideas what else may cause this code?
Thanks

 

Could be the resistance of the circuit you now have is not within the parameters of what the computer wants to see.

 

hmm, could be I suppose if thats is the only reason that code would be getting set....I was digging thru the mess of spliced wires under the dash tracking down why the TCC and Brake Switch flag were not getting set from the PCM over the w/e...bad connection in a wire splice due to cheap azz butt connectors used I suspect....probabyl something similar with the SES light..... Slowly soldering all of the hundreds of connections together over 5-6 years