Prius C Fuel :: MPG Huge Fluctuations In The Odometer View


May 17, 2016

I have a 2015 PRIUS C for 3+ months now (used to drive a 2012 PRIUS) . Approx 3K+ miles traveled already to date. Anyway, I noticed on 2 occurrence that my MPG on the odometer view has had a huge reading fluctuation. Prior to the first occurrence, my Travel A was somewhere around 46MPG and it closely matched the Odometer view reading. Then I noticed it go down to 33MPG while Travel A is still at 46MPG, both had the same miles traveled. I let it go and when I checked my MPG on the Odometer last week, it was back to normal.

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Yesterday while driving on the highway for about 30 minutes it read 14V the entire trip. What's going on? Normal?

Yesterday I also had my battery tested directly on the battery at Advance Auto Parts with a computer battery tester certified for AGM batteries. It tested at 12.75V exactly, which is normal.

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Couple of notes:

I made dam sure the timing was correct and belt teeth were installed properly, checked it about 10 times before buttoning everything up. Only thing I can think of is that the belt is too tight but I don't see that causing this problem.

I did clean the pcv valve and a few electrical connections which solved the problem short term, but has come back 3-4 weeks later.

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