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1993 with CCM C41, H41 H54 - PCM ERR! Idles at 1k rpm fans always on.

40th

New member
Joined
Apr 30, 2016
Messages
2
Location
Ohio
Corvette
1993 40TH
Hello!

My name Ryan and I'm having a heck of a time with a 1993 40TH.

We bought the car a month ago with 75k miles the car died on the test drive but over all ran fine before and after that.

Now we have had the car a month and the gremlins are running wild!

Here are the known codes

1. C41 H41 ---

4. EER.

9. H64, H72

1.0 Blank

Both fans are on full at all time.

When you turn the key the car starts up and idles around 1,100 Service ASR Service Engine Soon and Service Ride Control lights are all on.

Motor runs but if you hit the gas it will backfire out the intake.

Every few starts the car will run fine idle as it should Service ASR Service Engine Soon and Service Ride Control lights are all go out and the codes will read.

1. H41 ---

4. ---

9. H64 ---

1.0 black

I do have a Factory Service Manual for my 1994 and did find some info on this issue but am unclear on the repair of the data link between the CCM and PCM.

Any help would be great.
 
Anyone have any thoughts?

Perhaps anyone know if a better place for me to post this?
 
I'd start by checking and cleaning your grounds.
 

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