| TurkeyCreekDad |
Aug 10, 2022 10:15 PM |
2009 A6 parasitic battery drain
Hello all, I have strange issue that I cannot seem to get any good help on. This is a 2009 Audi A6 3.0T V-6 that is in really pretty good shape, minus one major problem.... it's always dead. After a day or two, the voltage on the battery will drop as low as 9V requiring a charge (after climbing into the trunk to pop the damn latch.)
This issue has been happening for over 6 months now and I have thrown everything, including the kitchen sink at it. Below is a laundry list of things that we have tried to resolve the issue. Any further suggestions would be very welcomed at this point.- New battery installed and configured
- Tested each fuse with a multimeter for unusual voltage
- Removed the battery from the keyfob during a series long tests, after reading that someone found theirs was randomly checking in overnight
- Tested voltage with multimeter connected in series with the battery overnight
- Discovered that the Navigation DVD receiver in the trunk always has a red LED indicator on even after it appears to have gone into deep sleep. Therefore, we have tested it for days without that fuse and the problem continues
- Left it with our local Audi dealer for 3 months and they found zero issues that could be the culprit. They had a few hunches and some suggestions to fix it but nothing ever has.
- The last thing the dealer tried was replacing the heater control unit. They said they had no scientific proof why that might help, but it 100% fixed two other Audi's of this generation, with this similar elusive problem.
I am about to run this car into the nearest lake if I cannot come up something that keeps it from dyeing ever couple days.
Thoughts?
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