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C5 Code "C"??????

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Old Mar 28, 2016 | 02:37 PM
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Clancy209
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Default C5 Code "C"??????

40BCM3091 is a "C" code that showed while I was checking codes. I cannot locate it on any of my listings. Some of you guys have exceptional knowledge on codes, or deal with people who also have great knowledge.

Can someone identify it for me.

Thanks in advance for the help.
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Old Mar 28, 2016 | 02:59 PM
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WELL,,,,,,,,,,,,,,,,,,, GOOGLE Says:

B3091 Content theft system sensor (Shock/Intrusion/etc.) signal circuit low

Unless it a hatch sensor or a door /lock sensor not playing well, Ive never see that one:

What year C5 and does your alarm / Theft Deterrent system work properly. roll down the windows. Use the FOB and lock the doors. See if it alarms properly if you open the door from the inside with the alarm set.

See if you pop the trunk with the emergency cord with the alarm set and the hatch sets off the alarm.



Here is a very good website for any and all DTCs

http://docslide.us/documents/obd2-trouble-codes.html
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Old Mar 28, 2016 | 03:00 PM
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Was the C after the code. Normally after a code it will show a "C" or "H" or sometimes both. If it is a "C" after the code than means it is a current code. "H" is for a history code that has cleared and is no longer current. Hope this helps.
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Old Mar 28, 2016 | 06:52 PM
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Thanks all, however code is definitely 40BCM C3091 H. C
2001 very alarm works opening both doors from inside.
Anything else come to mind
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Old Mar 28, 2016 | 10:33 PM
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Originally Posted by Clancy209
Thanks all, however code is definitely 40BCM C3091 H. C
2001 very alarm works opening both doors from inside.
Anything else come to mind
The C code before the number indicates that this is a Chassis Error code. The BCM indicates that the code is being thrown from the Body Control Module ECM. I do not have a listing in my DB for a C3091, so it is probably a proprietary GM code I do not have access to.

Call a dealer. They should be able to look it up for you.
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