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Old 03-25-2013, 10:16 AM
Trapper Trapper is offline
I'd rather by driving
Location: Sudbury
 
Join Date: Jun 2012
Posts: 78
Mein Auto: 2003 Z4 2.5 Titanium Silv
I have been researching this issue for a while now and read in a post somewhere last week that someone have the same issue while attaching a battery tender. In this other guys case he took it to the BMW dealer and found the problem was some dirt got in between the battery post and the connector causing the swinging voltage code.

So I had a Eureka moment thinking I had the same problem. So this past weekend I took apart and cleaned both battery posts and connectors with emery cloth, removed any residue with a clean rag then reattached and tightened the crap out of them.

Hooked up my Air bag scan and tried to reset code.......it's still there

I am dropping the car off tonight to get some service done (tranny spill n fill, diff fluid changed) and will ask the technician to see if they can clear the code. Once I hear back from them then I will know if my tool is a piece of crap or I have a fault somewhere that I did not fix so in that case maybe my tool is okay.

Will let you know next week when I get the car back.
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