Bad battery or alternator

30

Asked by cake Feb 19, 2021 at 06:34 PM about the 2008 Mazda MAZDASPEED3 Grand Touring

Question type: Maintenance & Repair

When my cars rpm rising pass 3500 the
battery light comes on. My tool scannner
show the battery bolt and when the light pops
up it shows 11.2
But at stop it goes back up to 14.2

1 Answer

Drod answered 4 years ago

Most likely your alternator has a bad module- some of them have a few separate ones just for safety’s sake; if one goes bad it doesn’t kill the whole thjng right away. It also could be that you are overtaxing the alt and need a higher amp rated one. Do you have a CEL?

Mark helpful

Your Answer:

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