Codes after battery replacement
Thread Starter
Drifting
Joined: Sep 2022
Posts: 1,785
Likes: 2,033
From: In the woods
2024 C5of the Year Finalist - Unmodified
Codes after battery replacement
During winter storage I had the battery removed from my 2K on a tender. Apparently sometime I knocked the clamp from the terminal, battery was dead as fried chicken. Put it on the charger over night, in morning charger indicated fully charged....but it was not. Tried to start, stumbled and died with not enough charge to turn the engine over again. Purchased a new Red Top, charged it a bit and installed it. Started right up with an immediate CEL. Pulled out to the driveway and pulled codes. TAC and accelerator pedal module codes, failed to write the number down. Also have a burnt bulb indicated by the right turn IP light being on only with park or headlights on with no right signal. Could this be from an over voltage? I ask because I did put the battery on a charger for about 15 minutes to find out they are sold fully charged, it indicated 13.2V when installed. Or could the very low voltage from trying to start it have effected something. 13.2V isn't too high however I know with these things anything is possible. TIA, Charles.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Recommend using the DIC Internal code reader to CLEAR ALL DTCs. Once cleared read again and troubleshoot any new DTCs. Anytime you remove the battery from a C5 or C6, ir have a low battery output, random DTCs will happen. After you clear the DTCs, post up any that return. Yes, the U series DTCs are important too.
Thread Starter
Drifting
Joined: Sep 2022
Posts: 1,785
Likes: 2,033
From: In the woods
2024 C5of the Year Finalist - Unmodified
Thanks. Just as ya'll predicted the codes did go away and so far have not returned. It does still have the EBCM non communication codes, those have been known about for years and I have the luck of having the last year of non repairable EBCM box. Thanks again for the replies.
