Little Quirks with a 2022 Big Horn 4x4

Daviddnv

Junior Member
Joined
Nov 10, 2021
Posts
13
Reaction score
5
Location
Orlando/Daytona Beach, FL
Ram Year
2022
Engine
Hemi 5.7
Hi all,

I have almost 2K miles on my new 22 Ram Big Horn 4x4, night addition and I have a couple questions and quirks. I’d like to see if others have seen the same thing. Sorry for the length, but it’s easier in one posting.

I lose the radio control button function on the left side of the steering wheel from time to time. That would be for scrolling through channels (up and down) and scrolling through pre-sets (the button). I find if I rest the radio (holding in the volume and power buttons for 10 seconds), the function comes back. Happened twice so far. I think it might have to do with using the buttons while in the google maps, but I’m not sure.

Another odd thing is the backup camera goes out sometimes. It will be fine, then it will flash and go to a blue screen. I can go in and out of reverse, and it does not come back on. After the truck is actually off for some time, it works fine. Happened a few times now.

Now just a question…. How is the average MPG calculated? Seems pretty straight forward, miles driven divided by gallons used. But it seems like the “average” displayed changes way to quick to be an actual average. I’m thinking it’s weighted or used with time driven, or something like that. I can start out at 15 MPG and within a 10 to 20 miles be up to 17 MPG. No way that can be an actual average. BTW, I’m hoping the mpg gets a little better, but I have 3.92 gears, so I’m not too sure about that and I’m using 87 gas.

Anyway, thanks for reading. Any insight is appreciated.

David
 

turkeybird56

Military Vet 1976-1996 Retired US Army
Military
Joined
Aug 2, 2018
Posts
11,868
Reaction score
32,553
Location
Central Texas
Ram Year
2019 Bighorn, 4 X 4, 3.21 rear, Bright Flame Red Pearl Coat, Mopar tonneau cover,Westin Bed rug
Engine
Hemi 5.7
The average meter will go up and down based on "calculations" being made, and it will jump up and go down just as fast. That be the "Famed" lie o Meter. Fill up your truck med speed to first click. Drive, then fill up same way and hand calc. U will find yer city 13-18, and Highway 17-21. But may be slightly off if U have E-torque which I do not have and U have 3.92 gears and I am geared 3.21. Gas Debate: Too many threads like oil. I personally use the recommended 89 vs the acceptable 87. Also, my lawn mower runs better on 89 and my chain saw needs 89, so I just do the same grade on all stuff, but that is IMHO.

If U have to reset radio a lot, may need to be reflashed and Camera going to Blue Screen, either flash or maybe lose connections in tail gate or behind radio. Not had either issue on MY 19. Could also be a lose connection in SW controls. All dat since new truck be Dealer, Hello.

AGAIN, all my opinions IMHO.
 
OP
OP
D

Daviddnv

Junior Member
Joined
Nov 10, 2021
Posts
13
Reaction score
5
Location
Orlando/Daytona Beach, FL
Ram Year
2022
Engine
Hemi 5.7
Thanks for the replay. lie-o-meter, I like that. I guess I'll do my own math for the mpg. I figured about 17 to 18 overall, especially since it's mostly flat FL driving. As for the gas... the 89 is about 10% more in price right now. $.30 more per gallon at about $3+ a gallon. I'm not sure if I'd see a 10% increase in mpg. It'd be like 16mpg to 17.5mpg, I'm not sure if I'd see that. I see there is a update software option in the setup, I'm guessing if I connect to my wifi it will update?

thanks again.
 

RAM432

Member
Joined
Dec 3, 2020
Posts
30
Reaction score
35
Location
Kentucky
Ram Year
2021
Engine
5.7L V8 HEMI VVT
Now just a question…. How is the average MPG calculated? Seems pretty straight forward, miles driven divided by gallons used. But it seems like the “average” displayed changes way to quick to be an actual average. I’m thinking it’s weighted or used with time driven, or something like that. I can start out at 15 MPG and within a 10 to 20 miles be up to 17 MPG. No way that can be an actual average. BTW, I’m hoping the mpg gets a little better, but I have 3.92 gears, so I’m not too sure about that and I’m using 87 gas.

Driving a 2021 5.7 Big Horn here, so these are my impressions on that model, though I would suspect there haven't been any major changes to how they are presenting MPG. I keep track of my MPG through an app on my phone and like to compare to what the truck shows me.

I could be wrong but it appears the RAM way of calculating MPG is solely based on how many miles you got out of your last fill-up and that's about it. If you had a particularly bad tank of driving with lots of stop-and-go, idling, etc., then your MPG reading is going to start out looking fairly bad when you fill up again. Hit the highway at cruising speeds for a few miles and you'll see that MPG guesstimate shoot up because you're far outpacing what your last tank gave you.

Again, that's been my observation in putting just over 10k miles on my 2021, both in regards to the MPG reading and the miles left on the current tank reading. There doesn't seem to be as much intelligence put in the algorithm as a Ford Escape I used to own, which would look at the last few hundred miles you had driven.

One last note, I've logged every single tank fill-up through this app for the last 6'ish years now, across three vehicles from different manufacturers. All three consistently tell me that I'm getting about 1.5MPG more than what I actually logged for the tank.
 
OP
OP
D

Daviddnv

Junior Member
Joined
Nov 10, 2021
Posts
13
Reaction score
5
Location
Orlando/Daytona Beach, FL
Ram Year
2022
Engine
Hemi 5.7
... I could be wrong but it appears the RAM way of calculating MPG is solely based on how many miles you got out of your last fill-up and that's about it. If you had a particularly bad tank of driving with lots of stop-and-go, idling, etc., then your MPG reading is going to start out looking fairly bad when you fill up again. Hit the highway at cruising speeds for a few miles and you'll see that MPG guesstimate shoot up because you're far outpacing what your last tank gave you.
...

That's interesting, I don't see how it could be based on "fill-up". Does it know how any gallons are going into the tank at fill-up? I could be filling up at 3/4 a tank. Anyway, I'm sure it's not miles/gallons used, that would be too easy. thanks.
 

brian42

Senior Member
Military
Joined
Apr 1, 2019
Posts
192
Reaction score
125
Location
San Diego, CA
Ram Year
2019
Engine
Hemi 5.7L
The truck has no idea how much actual fuel is going into your tank. Everything is based off of data stored in the computer (XX ounces for every XX millivolts put out by the level sensor (the higher the level the more millivolts the sensor puts out). The calculation is "on the fly" as you drive the truck. I don't know what it uses but I'm sure there's plenty of sensors it uses to calculate your instantaneous MPG. That is averaged out over time since you last reset the MPG screen (and I think it resets at 10K miles if you let it go that long but don't quote me on that) and gives you your overall average.

Many of us hand calc and, at least for me, the truck "estimation" is usually about .5 mpg higher than what I get from my simple method (miles driven divided by gallons added).

As for your steering controls I have not heard of that issue. The backup camera, however, I have read of. If you can soft reset the infotainment and both start working then that definitely seems like a software issue. I would take the truck in and have the dealership either update the software (if there is a newer revision) or re-install the current version to see if that is more stable and solves your issues.
 
OP
OP
D

Daviddnv

Junior Member
Joined
Nov 10, 2021
Posts
13
Reaction score
5
Location
Orlando/Daytona Beach, FL
Ram Year
2022
Engine
Hemi 5.7
The truck has no idea how much actual fuel is going into your tank. Everything is based off of data stored in the computer (XX ounces for every XX millivolts put out by the level sensor (the higher the level the more millivolts the sensor puts out). The calculation is "on the fly" as you drive the truck. I don't know what it uses but I'm sure there's plenty of sensors it uses to calculate your instantaneous MPG. That is averaged out over time since you last reset the MPG screen (and I think it resets at 10K miles if you let it go that long but don't quote me on that) and gives you your overall average.

Many of us hand calc and, at least for me, the truck "estimation" is usually about .5 mpg higher than what I get from my simple method (miles driven divided by gallons added).

As for your steering controls I have not heard of that issue. The backup camera, however, I have read of. If you can soft reset the infotainment and both start working then that definitely seems like a software issue. I would take the truck in and have the dealership either update the software (if there is a newer revision) or re-install the current version to see if that is more stable and solves your issues.

ok, I think I might get it. The average might be more of an average of the instant calculation. Or, an average of a sampling of the instant mpg. That might actually make a little more sense. Thanks.
 

Gazoo

Junior Member
Joined
Nov 30, 2021
Posts
28
Reaction score
27
Location
Usa
Ram Year
2022
Engine
Hemi Gas 6.4L V8
I have 2022 6.4L gas with 1,800 miles. I had one issue with the radio. There is a reset for it in the vehicle system screen, try it. I wish I had a radio with buttons. I Hate the screen. Here’s a question, how come when you hit the “lower fan” button it only goes to 1 and not to “off”?
 

Podcast

Senior Member
Joined
Apr 8, 2012
Posts
259
Reaction score
56
Location
Da sticks
Ram Year
2019
Engine
5.7 Hemi
Since it's a big horn I'm guessing you have the 8.4 screen. I've not heard of any blue screen back up camera issues on those but they are more common on the 12" screen and that I've seen on my own truck. It is a software issue and I'm not aware of an update to fix this as of yet.

As for the MPG estimates on the EVIC, it's a rolling average, not a total average. In other words the average MPG reflects the past 150-200 miles only. It does not calculate past that which is why it changes much more quickly than other make/models out there. I personally do not mind this as it helps me watch mileage trends. If it ran off of total miles since last reset I could have 5,000 miles since that reset and the average isn't going to change hardly at all which does not let me see that I have a bad tank of gas or whatever other issue I may have run into causing poor mileage. When you reset the average it does begin calculating at the point of the past average using it as a "base" so to speak.
 

runamuck

Senior Member
Military
Joined
Sep 4, 2018
Posts
1,271
Reaction score
1,489
Location
dfw
Ram Year
2019
Engine
5.7 Hemi
I have always used 87 in my laramie except 89 a few times when towing on high heat days. truck runs fine and I have got over 20 mpg on the highway many times.
 
Top