What would cause my trip odometers to reset automatically?

This is odd. The truck was outside in the sun all day while I was at work and it was pretty hot. Probably close to 100 degrees. When I started the truck it was rather hesitant to start. It did, but it did like 3 short vruunns with longish gaps between and then started.

I didn't think much of it, but I noticed when I got home my odometer wasn't on Trip A which is where I normally leave it tank miles and when I clicked over to Trip A it was showing just the miles I drove from work and both Trip A and Trip B were the same. They clearly were reset when I started it. However, nothing else seems reset like when the battery is dead. And I don't think a dead battery causes the odometer to reset although I've never really paid attention.

Anyone have something like this happen before or have any idea what might be going on?

 

Have you put in a new battery yet? If not, have AutoZone do a check on yours. It's free. They will tell you whether it's good or not.

 

Still original battery. It's a 2017 with about 58,000 miles. I'll take it over tomorrow to get the battery tested.

So the odometer issue could be from the battery blinking out or something? It started, so that tells me the battery was "good enough" so not sure why the odometer reset.

 

I had this happen to me last month. (2016 + 61,000 miles) My odometer reset itself twice and then the battery died. Low voltage Buy a battery ASAP.

 

The high temperatures you have been having, plus sitting on a hot black parking lot. The temps have to be around 150ish. Temps like that will just cook any battery.

 

100% from low voltage on the battery. It might still start the truck but if its slightly less than what it needs it will reset the odo.

 

Yap. The starter temporarily drops systems voltage below the keep alive memory voltage. Or something like that anyway....

 

Sounds reasonable I guess. Just didn't know the odo was battery dependent like that and nothing else seemed to reset. I'll get it checked and probably a new battery.

Thanks everyone for the help.

 

ODO or trip? Afaik the ODO has "keep alive memory". Fucked that up last time.

 

Yeah, trip. I was just being lazy with the keyboard.

 

I think trip will go to 9999 max and reset. Did you happen to be near that mileage when you parked it?

 

Definitely is on 2nd gen, can confirm..so I'd surmise the same is true here. Had this happen whenever I disconnected mine or had it die on me.

9999.9 off the top of my skull..again, 2G but pretty sure this is true of 3G

 

Battery is probably on its way out. If you disconnect it for an hour or so, you should get similar results.

 

I had a friend with a similar weird issue on one of his cars. Every couple days the clock would reset.
Truck never had an issue starting. He got the battery replaced and the clock no longer resets.

 

I also had this happen after I installed the remote start and started it remotely. Once in awhile it will reset the trip odometers.

 

It's almost definitely a low battery. The only other culprit would be a defective trip odometer RESET button/switch...but this is VERY unlikely.

 

No, it was like 250 miles and Trip B was probably 1300 or something. I don't reset that one as often. both are now exactly the same and the distance home. Pretty sure based on the feedback here it's the battery.

 

Quick follow up. Wouldn't start today. Had to jump it. Yep, bad battery. Got a new one and all is good.

Bonus was it gave me a chance to test my new NOCO Boost. That thing is the shitz. Can't believe I waited this long to get one. Started right up like it had a new battery.

 

Gb40 or 70?

 

GB50. Seemed a good compromise.