Thread: Velos Tune Help
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      04-16-2020, 07:44 PM   #18
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Drives: 2012 BMW X5 50i
Join Date: Jul 2018
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Quote:
Originally Posted by eDubz View Post
Well now the issue has evolved into a low voltage issue. Not sure if I should start a new thread or not...

I took the car for a drive today and the voltage was very low (11.8-12). I'm assuming the voltage issue is causing my PDC 'under voltage' code as well.

How do I troubleshoot voltage issues? It has a brand new battery. My buddy mentioned the alternator. Is there anyway to test that without throwing in a new alternator? Would hate to do that if it's not the issue.
Before you go any further, have you checked the ground straps? They are notorious for going bad and causing all kinds of electrical gremlins. There are several and one of the main ones to go bad is on the drivers side close to the steering rack/differential. You can see it when you pull the drivers side front wheel or when underneath it.
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