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P3125 - 495,496,497 and 484

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I havent changed the 12v batt. It was fine as far as I know before the car stopped. Batt only 2 years old. Although, it is now flat as the car has been sitting there for 4 months. Have trickle charged it a few times but has stopped holding charge now as gone below 7%. 

Wouldnt that have come up on the Diagnostics?

Would it have affected the Inverter or caused a P3125 -  Sub codes 495,496,497 and 484?

Is it worth buying a new battery first - I need a new one now anyway!

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A bad 12v battery will stop the hybrid system from working- happened to me and the correct replacement is not cheap. It is a good starting point.

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