Trip computer not calculating mileage ?? Help !

[HWHarry]

Anybody know why my trip computer is not calculating the mileage for previous trips ? It tracks the distance but no mileage ???? It worked after the first fill up but not since.

[johnwill]

Snoop around in Vehicle Settings > Meter Setup > Trip A Reset Timing.

Once can specify just how and when these things reset themselves (at fill-up, manually etc etc).

Thx

[Sadus]

My numbers lost their average fuel stats too, when I changed that setting to make Trip A reset automatically after each fill-up. After getting gas it reset ok, but the history looks like that on mine too now. Still waiting to have to fill up again to see if this first full tank "sticks".

I had originally tried making Trip B the one to reset every fill-up, but there is no "History of Trip B" detailed page like that for whatever strange reason.

[MN_Runner]

Your screen looks weird to say the least. My system has been very accurate. Two methods (the car calculated and miles/gallons) match. Try reset after a complete refuel and see if that clears out everything.

[fw_fw]

Originally Posted by Sadus

My numbers lost their average fuel stats too, when I changed that setting to make Trip A reset automatically after each fill-up. After getting gas it reset ok, but the history looks like that on mine too now. Still waiting to have to fill up again to see if this first full tank "sticks".

It won't, mine has not been tracking tank averages ever since I set mine to automatically reset Trip A with each fill-up. It's been one of the 3 things on my list for the dealer to address with the first service visit.

[Marsean]

I manually reset the mileage every fill-up. I believe if you reset IMMEDIATELY after turning on the car, the current data hasn't yet populated on the screen and will thus show a blank space on your recent history after reset. I noticed this after resetting too early once. I wait a little while now (no more than 30 seconds) and it hasn't been a problem.

This makes sense for folks who have the Trip A auto-reset functionality turned on; the system performs the reset as soon as the car is started, before the prior data can populate. Small glitch, I guess.

[HondaTechAV6]

looks like a software glitch.

if this car rolled in my bay like that i would start with disconnecting the positive and negative battery terminals, removing them from teh battery and holding them together for about a minute. this will drain all the capacitors in the vehicle, effectively resetting everything. then i'd go on a road test to see how it is.

if it's fine i'd let it go. if it came back with the same problem i'd be on the phone with techline asking if it's a known problem, etc, and if they wanted to replace the audio unit or pcm(whatever inputs that information to the screen)

[glen e]

Originally Posted by HondaTechAV6

looks like a software glitch.

if this car rolled in my bay like that i would start with disconnecting the positive and negative battery terminals, removing them from teh battery and holding them together for about a minute. this will drain all the capacitors in the vehicle, effectively resetting everything. then i'd go on a road test to see how it is.

1st time I've seen this written in a long time - we've been resetting BMW's for years doing this...like a big CTRL-ALT-DELETE for the car - works every time...every tech I know has a 16 gauge wire with two alligator clips at the ends hanging from his snap-on box for this...

[HWHarry]

Well, since I posted this I filled up once again and without changing a single thing it registered the mileage on the last trip ???? Waiting for the next fill up and I'll post again. Thanks for all the suggestions btw. I was also digging in the settings and can see the page referring to this screen and there seems to be an option to control how trip A will be reset but if you select that drop down menu it only gives you reset on fill up, there are no other options. Weird.

[Hardtopguy]

Mine did that for the first three or four fill ups and then started saving the MPG's. Not sure if that had anything to do with it or not but its working fine now.

[roadrunner117]

Mine hasn't been saving the MPG for the past 3 fillups. I'll keep it on this setting and see if it eventually starts saves the MPG.

[glen e]

you have to fill the car to the brim - so to speak - otherwise it does not know how to calculate the total to start...partial fills won't work...

reset trip A on the odometer stem too....

[MM49]

^ Not true. At least not for 07 Accord. I can put $20 gas in it and it would restart(I set it that way). It gives me range for the gas I put in and calculates mileage. Highly doubt its different for new Accords.

[HWHarry]

I was thinking about this again today and I remembered that the last time I filled up AND it reset and recorded the mpgs, I had the key removed from the ignition. It seems to me the previous fill ups I may have still had the key in the ignition. I'm just tossing possibilities around but I wonder ?

[pgm1713]

My '13 LX was doing the same thing. On the last two fills it wouldn't drop down the mpg data. Only the miles. I have it set to reset A after refuel.

What I had done on the first two was just start the car right up. It would reset just the miles.
What I did last time was turn to ACC then let it load. Then to ON for a few seconds. It won't set yet. Then start. It registered the miles and mpg from previous tank and dropped them down.