Charging System Fault Code
Thread Starter
6th Gear
Joined: Jan 2003
Posts: 6
Likes: 0
From: South Pasadena Fl
Charging System Fault Code
I have had 3 different times now the "Chaging System Fault" light come on upon starting of my 02 roadster. I have had it to my local dealer and they said they wanted to try a new alternator but could not produce any information that it was bad. Amps were good and volts were good. It seems to start and run fine but this light has flashed on for just a couple of seconds each of these 3 times. They wanted $495 for the alternator and $88 to install it. I hate to put on something that isn't broke. Have you got any reccomendations?
Thanks,
Mark
Thanks,
Mark
Melting Slicks
Joined: Oct 2002
Posts: 2,855
Likes: 0
Re: Charging System Fault Code (botrs)
Don't replace the alt yet, I think your 2002 had a better factory battery but my problem turned out to be battery acid from the old battery (OEM) had dripped down the inside of the plastic sheathing to the starter, ruined the starter, cables all kind of s$#@ and this a year or two after taking out the OEM battery--I bought the alt for nothing, 500 bucks for a damn alt is crazy and the starter is 350 to 400 bucks more-- good luck but it sounds more like a grounding prob then the alt to me like a ground coming loose and sometimes flashing the warning, if this is the case it will get worse the looser it gets until it shuts the car down---the fuse box near the battery has a cluster of wires coming out that are clamped down by a good size nut that is just under the cover--make sure this is tight when loose sometimes it does what you say, sometimes will not start and will go into reduced power whenever it shakes loose a little--my system is currently telling the PCM I am running on 25volts so it won't even start but I think we found the faulty wire---a 10 cent wire screwing up a car with 50K in mods alone :cuss
Team Owner
Joined: Sep 1999
Posts: 20,054
Likes: 44
From: Swansea IL
Re: Charging System Fault Code (skip89)
Sorry to jump in here but any idea what code P0803 HC means in a 2004Z. I got a check engine light and car runs OK. thanks, Skip :chevy
Tom
"AlohaC5" Senior Member
Joined: Jun 2003
Posts: 3,562
Likes: 44
From: Madison, AL
Re: Charging System Fault Code (skip89)
You need to install a CAGS Defeat device. It appears someone disconnected the plug so they could shift through the gears without the vette controlling the 1-4 shifts. Disconnecting without using this device will set off the code.
Safety Car
Joined: Aug 2000
Posts: 4,537
Likes: 84
From: St. Joseph MO
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Charging System Fault Code (botrs)
That alarm will be enabled when (senario #1) battery voltage drops below 11.0 volts. Or (senario #2) if the computer doesn't see anychange in output voltage from the alt within a certain time frame. Usually if senario #2 is true you'll get a p1637 or p1638 code. If you want to, take the alternator off and bring it to a local auto parts store to be checked out, usually for free. Then go over all battery and alternator connectors. :cheers:
Melting Slicks
Joined: Mar 2001
Posts: 2,233
Likes: 5
Re: Charging System Fault Code (AFVETTE)
Tom, thanks for the list. That is the code I got twice now and I do have a CAGS device from Mid America (new one) installed. Any ideas, the device has been on over a month. Thanks, Skip :)
