oklahoma

I need help with a 2001 c6a4. It has a past history of chronic battery drain traced to a bad passenger seat lumbar switch. That fuse has been pulled and a new battery installed. No further dead/low battery condition. During this time the service abs,traction control,and ebc would illuminate with no codes and would then clear after several driving cycles. Now these lights and dic warnings are on all the time but no codes are set or stored. I have looked at almost all of the posts on this topic but they always had codes showing and I do not. Thanks for any help.

oklahoma

Thanks for the post re c5a4 with lights but no codes. Will check for codes after driving but before shutoff. Is the swps sensitive to voltage drops/spikes that might occur when a battery is losing storage capacity?