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My experience with other cars is that a bad lead acid battery can be tricky to diagnose. I had one test well multiple times but would drop voltage low enough after a start in cold weather that it would throw seemingly unrelated codes. Changing the battery solved the problem. The battery finally tested bad after sitting outside of the car for a week. The voltage you mentioned is more reflective of the charging system. Good luck!
 

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Discussion Starter #23
just 1 more information. the batteries on the pacifica hybrids are not lead acid. they are AGM batteries, supposed to have longer life than lead acid.
 
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