0

This question already has an answer here:

My dashboard screen in my 2013 Chevy Cruze usually reads between 14.9-15.1v lately. I've been told that this is unusually high. Given this though, I have not experienced any problems as a result of this "high voltage reading".

Do I have a problem? What issues can arise from having a high voltage?

It's been pretty cold out lately and my car starts fine, where many others around me seem to be having battery issues.

I have not tested the battery with a multi-meter or anything of the sort, the reading is coming from the dashboard.

NOTE: Bought the car used with an amplifier installed. Not sure if that changes anything.

marked as duplicate by JPhi1618, BillDOe, Bob Cross Feb 4 at 15:44

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Just a note on the linked question - a higher voltage can make the battery operate too hot. Since it's been cold where you are it might not be a problem at all, but once it gets worse, it could quickly kill your battery. – JPhi1618 Feb 1 at 19:26
  • @JPhi1618 Funny, my answers are just about the same... And, can tell you that the voltage comes down to 14.8 so it does not overheat the battery... – Solar Mike Feb 1 at 19:27
  • @SolarMike, Yea I wouldn't worry about voltage around 15v, but if it starts to get worse and goes around 16v I'd look at replacing the regulator (which probably means the alternator) – JPhi1618 Feb 1 at 19:29
  • @JPhi1618 I have a gauge I fitted to make sure I know what is happening - used to be able to draw an alternator regulator circuit from memory... So I know what I'm looking for. – Solar Mike Feb 1 at 19:31
  • This is normal for GM cars and Trucks, they run a bit higher voltage than most other brands when under a load. – Moab Feb 1 at 23:29
2

My car is doing the same - and it's because the demands of lights, heater etc plus the effects of the cold are making the regulator charge the battery more.

I have put a multimeter on mine and have seen 15.3V - checked the detail 2 winters ago as i had to replace the original battery (which had a date stamp showing it was 10 years old). In the summer the voltage is around 14.5 to 14.7 and I do keep an eye on it.

I did check the manual and it was in there that it can get that high - but the regulation profile is also controlled so that it will shut down the alternator as well to minimize load as it sees fit.

Either give it a good run so it gets a decent charge or charge it overnight with a good charger and see how it behaves. Once the battery is properly charged the voltage will (should) come back below 15V...

Not the answer you're looking for? Browse other questions tagged or ask your own question.