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Voltage Fluctuation at idle

Discussion in '2.5 Gen Tundras (2014-2021)' started by Newbie01, Sep 23, 2022.

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Sep 23, 2022 at 3:28 PM

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Newbie01 [OP] New Member

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Sep 23, 2022

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#83841

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1

Gender:

Male

Vehicle:

2017 Tundra SR5 TRD Off Road

Hello all,
I have a 2017 Tundra with the 5.7l.

I was wondering if anyone has run into a problem with their voltage fluctuating when below 700-800 RPM. It is pretty consistent around 13.8v or so until then. Then it drops and bounces back and forth between 13.4v-13.7v and occasionally dips to 13.2v. No trouble starting the truck and the battery is being charged. It just bugs me to see it bounce back and forth like that.

Is it normal? If not, do yall have any ideas?

I have checked the battery ground, the engine ground, has a new battery(it would dip below 13.0v on the old one), checked the alt-s fuse and the lh-ig fuse. Not sure what else to check.

Any information is appreciated.

Newbie01, Sep 23, 2022

#1

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