[Z06] CAGS Defeat/Engine Code Help
Thread Starter
Drifting
Joined: May 2000
Posts: 1,797
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From: Thompson Falls MT
CAGS Defeat/Engine Code Help
My '03 Z threw a check engine light on me. Thanks to info found on this forum I was able to pull the code. It's P0803C in PCM which indicates a current problem with the 1-4 Upshift Solenoid Control Circuit. I've had a CAGS defeat in the car for 4 years with no problem. I went ahead and cleared the code and that got rid of the Check Engine light. However, while the code immediately reappeared, the Check Engine light did not. Does it take a number of events or a time frame before the codes translate into a light or is it perhaps natural for me to get the code with the CAGS defeat in and my prior Check Engine light was a fluke? Do the CAGS defeat things go bad? TIA
Race Director
Joined: Jun 2005
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From: Lenoir City TN
St. Jude Donor '08-'09-'10-'11
Thread Starter
Drifting
Joined: May 2000
Posts: 1,797
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From: Thompson Falls MT
That shouldn't be the issue. If the module was truly burnt out the computer shouldn't even know it because it's been disconnected.
Thread Starter
Drifting
Joined: May 2000
Posts: 1,797
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From: Thompson Falls MT
I'll probably do this. The question still stands, though. If a CAGS defeat is in, will that alone cause the code, even though the defeat is working correctly? Or...is the defeat device supposed to provide the proper feedback to the computer so as not to throw a code? I'll submit this question to Corvettes of Houston to see what they say.
Safety Car
Joined: Sep 2003
Posts: 3,692
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From: Hayward CA
If you disconnect the CAGS wires - and leave them disconnected, the computer will set-off the CEL, and the 1-4 shift will be disabled. If you plug in a "bad" CAGS eliminator module, it does the same thing - set off CEL, and the 1-4 shift is disabled. Your module is bad.
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Thread Starter
Drifting
Joined: May 2000
Posts: 1,797
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From: Thompson Falls MT
I thought you meant the OEM shift module, not the CAGS defeat itself. COH says the bypass modules go bad pretty regular after 4-5 years so I'll just order another. He did say that the diode inside should tell the computer "everything's OK down here" so no codes should be set if it's still working correctly. Thanks for the help.
Race Director
Joined: Oct 2002
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From: Southern CA
I thought you meant the OEM shift module, not the CAGS defeat itself. COH says the bypass modules go bad pretty regular after 4-5 years so I'll just order another. He did say that the diode inside should tell the computer "everything's OK down here" so no codes should be set if it's still working correctly. Thanks for the help.
