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Voltage drops while driving.

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PCM = power control module. One of the numerous computers on modern cars. The voltage on my Buick is all over the place too, sometimes under 13V.
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Hey thanks for the reply. Well my cars an 03 and i never seen my voltage go to 12v while the car is running. So i dont think its the pcm cause i would of noticed the random voltage drops before. But if it is a pcm problem could i take it to honda and have them set it to not drop to 12v while dricving

 
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AcuraTL03

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