I cleared all the values sitting in my garage with the engine off. They all read the same "___", so I assumed the deed was done. Next time I drive it I'll check to see if it worked. The main one I'm concerned with is the average mpg as it calculated my trip mileage bringing the car home from San Diego last week @34.2 mpg. Now that I'm home and doing mostly around town driving, I'd like to isolate that to see what it gets in town.Right but there still is nothing to clear for current mpg as i stated above. When you come to a stop it will display "---" meaning it cant calculate mpg because you are not moving (miles/gallon) = 0/gallons = undefined number which is why it says "---" perhaps you are trying to clear it just as you come to a stop, but i assure you if you stay moving you cant clear current mpg, just the average mpg and average mph.
Of course you're right about the current readout, As for the average, I did clear that as my first 600 miles were strictly freeway (driving my new CX-5 home from one end of Calif to the northern part of the state) and as such was not really representative (34+ mpg) of what I can expect on a daily basis. Now I'm getting (still phenominal) readings of around 30mpg in strictly round town driving here at home.Current is instantaneous, it is calculated on your current speed and fuel flow at "this exact second" and is "real time" data.
There is nothing to cancel.!!
However Average is another thing.
Oh and don't clear your average for the last 1500 miles!! The longer the car has been accumulating data the more ACCURATE it will be, ok.