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Old 12-25-2014, 01:03 AM   #1 (permalink)
j12piprius
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Join Date: Feb 2011
Location: central california
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pris prius - '12 Toyota plug in prius
90 day: 71.09 mpg (US)
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ultragauge: DFCO disappeared

My ultragauge has always showed 9999 instant mpg for DFCO, but now shows less mpg for coasting in gear than coasting in neutral, for example 150 mpg coasting in gear and 225 mpg coasting in neutral.

The bank 1 O2 sensor goes to 0.000 immediately when coasting in gear. I've not checked the bank 2 O2 sensor yet. Any ideas why instant mpg doesn't show 9999 anymore, and am I still getting DFCO?

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