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Old 09-11-2019, 06:39 PM   #1
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Could having let the battery discharge too much caused my abs issue?

My car (02 e46 325ci) was in a crash and I bought it and repaired it and when I first got it it didn't have an abs light. I pulled the car into the garage and it sat in there for about 3 months as I slowly worked on it each day after school. One day I was doing wiring (had some damages connectors) and I went to start the car and it did the click click thing meaning battery is dead so I charged it. The next time I got it started it had an abs light and bmw scanner 1.4 told me "abs control unit failure". This is listed as red. The only other issue in the abs tab is "battery reached below 9v". Could having let the battery do this screwed up the abs unit? And if so can I reset the abs computer somehow?
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Old 09-11-2019, 07:43 PM   #2
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I got the abs code recently after cleaning the idle control valve and throttle body...freaked me out. I drove about 100 yds. and it went off on its own.

If you haven't driven it yet, don't panic. Having low voltage, or having the wrong things disconnected when you have enough power might be enough to trigger the code.

I don't know what caused mine, but perhaps the abs system takes over control of the throttle when it's active?
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Old 09-11-2019, 07:53 PM   #3
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Clear the code and drive the car. See if the error comes back.
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