Friday, August 10, 2018

Inaccurate Trip Computer in 2018 Honda Clarity Plug-In

While Honda got many things right with the 2018 Honda Clarity Plug-In, there are a few glaring mistakes. The first one is the trip computer (and the MPG display).

It seems it doesn't take into account the electricity use, so when I run on electricity alone, I get 199MPG displayed. And if the HV mode is used or the gas engine turns itself on, the MPG goes down but not nearly enough. It still shows numbers like 146 mpg. Only if you use the "trip" mpg readout and make sure to reset your trip meter (e.g. "trip A") one the engine fires up, do youget somewhat reasonable numbers, such as 40-50 MPG driving at steady 70 mph.

And the "distance to empty", which has the EV and HV part has a definitely wrong HV number. It should account only for gas and with the 7-gallon gas tank I expect to see a maximum of 7 gal x 60 mpg = 420 miles at the most optimistic estimate. But mine shows 716 miles right now, which would mean I would be getting 100 MPG running purely on gas. Madness.

Honda needs to fix this. It is completely unacceptable and is not rocket science.

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