MPG Gauge Weirdness

[VBWRRVBWRR]

So I've had it go from 21.7 one day after many months to 0.0 the next. Then after several months of it going up from 0.0 to 3.7, today it's says 99.9. I know it's just estimating but why such wild fluctuations? Nothing else is wrong with the car. Anyone else have this weirdness?

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[KingKona]

Are you resetting it?

 

[VBWRRVBWRR]

Nope. I'm doing nothing, other than starting the car and seeing the change in the digital dash.

 

[KingKona]

How long has this been happening for? And how often do you drive the car?

 

[VBWRRVBWRR]

I drive the car daily. Went from 21.7 to 0 around July last year. Went to 99.9 this morning.

 

[KingKona]

I drive the car daily. Went from 21.7 to 0 around July last year. Went to 99.9 this morning.

O.k......going from 21.7 to 0 could be that you accidently re-set it. Hard to know from a year + ago.

Going to 99.9 this morning makes me think you might have a battery issue. You might need a new battery.

These cars go crazy as soon as the batteries start to lose it.

 

[VBWRRVBWRR]

Got a new AGM type battery in December of 2021 to replace the dying/dead OEM one the car came with. Currently no other issues with the car and even when the original battery was dying, it didn't do this. Thanks for all of your input, I appreciate it. I'll continue to monitor and report anything new in the future.

 

[Crew4991]

0.0 MPG might be pretty accurate if you are working on those quarter mile times..

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