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post #1 of 4 Old 09-25-2013, 09:46 AM Thread Starter
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low battery

i had a low battery on my passenger side, it was corroded on the positive termenal, would that give me a bad ficm code and would it make it sound like a bad ficm
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post #2 of 4 Old 09-25-2013, 10:54 AM
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Quote:
Originally Posted by Diesel_trucker View Post
i had a low battery on my passenger side, it was corroded on the positive termenal, would that give me a bad ficm code and would it make it sound like a bad ficm
It certainly can. Also, batteries need to be changed in pairs or you will quickly be replacing one, then the next, over and over.

I would change both batteries, check and clean all cables/terminals, clear the FICM code and then monitor FICM main power for a while. It should never go below 46v. If it does you need to get it repaired or replaced.

I would also confirm the alternator is working properly after battery replacement.

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post #3 of 4 Old 09-25-2013, 11:25 AM Thread Starter
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well i sent the ficm in to get repaired bc of that code, and the place i sent it too called and told me that it tested good koeo and while cranking and running and i guess i have the 58 v ficm, then i tested both batteries and one showed good the other showed charge required, but ill replace both just in case
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post #4 of 4 Old 09-26-2013, 02:24 AM
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Replace both with quality batteries.

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