Q: My battery is not fully charged and gradually decreasing with decrease in temperature in my 2012 Prius

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Dear Sir, first of all thanks for this forum where we can get advice from experts like you. I bought my PHV last year in April. The battery worked well but I noticed decrease in charge limit with the change in weather. For example in July August September I got expected 26 kms after charge where as the same decreased in October November and December to 17 kms. Please advise what to do or its a normal issue. Regards

My car has 67547 miles.
My car has an automatic transmission.

Hello. Most of the time this is caused by a programming issue. I have seen these cars need to be re-programmed for issues with the batteries not fully charging in cold weather. If the vehicles computer have not been updated in a while I would have this done at the dealer. In other cases it may be the battery itself. Though this is still a fairly new vehicle I have seen the batteries fail prematurely. This system is best left to the dealer to repair.

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