brought my c5 2001 out of the garage a few weeks ago stored with battery disconnected fired it up and the traction control light came on along with usual warnings service traction control abs etc had this come up a few times previously but usually gone off after a few seconds this time it didnt stayed locked on solid with the code c1276 H C . reset the code would go away for about 30 seconds then on again ( not the easy relay fix code c1214 that brings the same warnings up ) so to cut a long story short tried a replacement ebcm found in spain at a silly price fitted that exactly the same so assumed some thing else was triggering the code tried everything new earths ( mine were powder in the connectors common problem ) chopped and solder lugged them to chassis continuity tested all cables ( not helped by 2001 wiring diagram incorrect showed connections 5 and 13 going to ebmc from pcm they are not used on my pcm ) 3 weeks later every connector wire continuity tested earth replaced . all earths checked modules provided with new earths and new battery fitted and its still there
now the bit i dont understand forgot to to turn the ignition off came next morning to resume head scratching as i can usually fix most things battery dead ok put it on charge for a couple of hours started it up and code gone been ok for a month now so if any one can shed any light on this i dont see how a battery slowly discharging can effect this its the weirdest fix i have ever had given that the battery was on and off for days whilst checking connectors and earths ( 2 of the existing earth multi pin connectors were very bad and its poorly designed i think for vehicle wiring almost as if they were designed to create problems a few years down the line )
now the bit i dont understand forgot to to turn the ignition off came next morning to resume head scratching as i can usually fix most things battery dead ok put it on charge for a couple of hours started it up and code gone been ok for a month now so if any one can shed any light on this i dont see how a battery slowly discharging can effect this its the weirdest fix i have ever had given that the battery was on and off for days whilst checking connectors and earths ( 2 of the existing earth multi pin connectors were very bad and its poorly designed i think for vehicle wiring almost as if they were designed to create problems a few years down the line )