all wheel drive disabled

[polarisxcr]

when my 2002 Rendezvous sits and idles for a short time the all wheel drive disabled light comes on, the abs light comes on, the brake light comes on, and a chime sounds. When it sits for a while not running and we start it everythings ok again, Until the next time it idles. Under normal driving it doesn't come on. It shows codesCO550, AND CO896

[Chameleon-kat]

I have heard (from the pontiac side), that the AWD disable 'could' come on as a result of lower voltage. Have you noticed anything that would indicate battery may be weak, I:E: slow starts or anything like that?

[polarisxcr]

Originally Posted by Chameleon-kat

I have heard (from the pontiac side), that the AWD disable 'could' come on as a result of lower voltage. Have you noticed anything that would indicate battery may be weak, I:E: slow starts or anything like that?

No problem starting or anything else electrical, thats what the codes are telling me also low voltage and it came on one time when I did a function test on the radiator fan motor. its coming on more regularly now I unhooked the speeker in the drivers door to keep my wife sain, the digging is overwelming. could it be a louse conection some where? I might try a new battery to see if it helps, but it does it when the vehical is running so there should be 14 volts at the time. Rick

[Chameleon-kat]

Since it appears your not having any noticable problems with battery, and that it happens when idleing, my next guess would be something to do with alternator/voltage regular not supplying enough power at idle. Bad connection also a possiblity, but I don't know where to look, I think it would not be cable at battery as that would cause starting problems. Perhaps the connection on the smaller positive cable (not the one that goes to starter).