Service Shifter+Replaced

[appzattak]

My 2017 ram 1500 was popping up the service shift selector a while ago and it kind of just disappeared and fixed itself while I had the new selector on order. I just replaced it with the brand new transmission shifter, rotary dial. I hooked my battery back up went and started my truck and a light went on on the shifter briefly went out and then my cluster was telling me to service shifter again and no lights will come on this new one at all. I reached out to the dealer where I bought the part and they say it is plug and play. So I'm not sure if this is just a waiting game with the computer or not, anyone else experience this?

Also I tried hooking up my original one and same thing, no lights will come on on it.

 

[tron67j]

The one thing I see a lot of here is that after replacing electronics and reconnecting the battery it takes a couple cycles of on and off plus driving to get the whole system talking again. If you can drive it try to do a couple cycles and see if that resolved it all. Good luck

 

[appzattak]

So unfortunately I wasn't able to drive it as the shifter was completely not working, however I did the couple of battery reconnects and let it just sit all night. Went out in the morning, opened my door and everything was working. So yeah definitely need some time after you replace it.

 

[appzattak]

After replacing the shift module, the problem is back. There must be another failure point causing this and I'm not sure where to look next. I hear there is something at the transmission/frame under the truck. Anyone know where I might look??

 

[kristop9]

No input but dealing with similar situation so interested. 2014 1500 5.7 with the 8 speed rotary dial. Got the "service shifter" message and stuck in park. Oddly enough my battery was 6 years old and at ~11.7v. Bought a new Interstate from Costco (not an AGM). Replaced it, started truck and shifter worked! Yay! fast forward 3 days (i dont drive my truck every day) and same message was back. Tonight i am leaving everything disconnected and a tender on the battery to make sure when i try tomorrow everything is optimal.

Mine seems so oddly linked to my old battery having low voltage. I wonder if an AGM battery would help....

 

[appzattak]

so this issue continues to be intermittent, some days it'll work. some days it won't. I finally hooked up alpha ODB to my truck and seeing what the code that it was giving and here's a screenshot of what that is. does anyone have any idea where I can't look on the transmission where this shifter communication plugs into or where I should be looking to see if I've got any corroded wires or bad connections?

 

[kristop9]

No input but dealing with similar situation so interested. 2014 1500 5.7 with the 8 speed rotary dial. Got the "service shifter" message and stuck in park. Oddly enough my battery was 6 years old and at ~11.7v. Bought a new Interstate from Costco (not an AGM). Replaced it, started truck and shifter worked! Yay! fast forward 3 days (i dont drive my truck every day) and same message was back. Tonight i am leaving everything disconnected and a tender on the battery to make sure when i try tomorrow everything is optimal.

Mine seems so oddly linked to my old battery having low voltage. I wonder if an AGM battery would help....

Solved mine with a new dial shifter assembly. Watched some Youtube videos on how to remove it, replaced, problem solved. I bought a used part off Ebay for ~$150, OEM is $475.

 

[appzattak]

I replace mine already and still am having to issue

 

[PoMansRam]

I would look at all the electrical connectors on the transmission and transfer case for broken/chewed wires and green corrosion.

It could be a bad connection, broken wire, corrosion, etc. on something on the data bus upstream of the dial shifter. Unfortunately, the way these data buses work, this makes everything downstream of the fault go dark.

 

[88ROOK]

After replacing the shift module, the problem is back. There must be another failure point causing this and I'm not sure where to look next. I hear there is something at the transmission/frame under the truck. Anyone know where I might look??

The dealer replaced mine and said it was all good, well luckily it went out at the dealer. so they checked further into it and found the fuse cluster was all corroded. so the replaced that and all is good for 6 months now. i questioned how the heck they happened when its a sealed unit, but they showed me all the corrosion

 

[Dlwashington98]

Did you ever get this issue solved I have replaced the shifter as well as the fuse box and still nothing

 

[appzattak]

not yet, driving my crazy. I am going to replace my alternator, I hear that those Fuse boxes can cause issues if voltage is not just right.

 

[Dlwashington98]

I hooked up my jump pack to it to make sure the battery wasn’t weak or anything and still nothing, insane everyone has these issues and nobody seems to know what the actual fix is.

 

[appzattak]

I have replaced my alternator now and still has the problem. I also had my bettery tested and the Snap-on tool said it is in great condition. I'm at a complete lost and fear taking to the dealer will just result in wasted money with no fix

 

[RustyShakelford]

I’ve been battling this issue for the last 8 or so months; took it to the dealer after replacing the shifter with a used one and they told me it was a bad shifter (it’s a gamble you take when you buy used) so they replaced it with as new one and flashed my ecu, just good enough to get me home and the issue to return. It has been intermittently, so it’s had to track down. Around February (2024) I got a spun bearing and I had to park it until I got it fixed (whoo hoo a good reason for a 6.4 swap) today I got her all buttoned up and ready, it starts and idles smooth, unfortunately I can’t drive it because THE SHIFTER WON’T WORK. I’ve done the TIPM cleaning and such, I’ve chased wires as much as I can and nothing; I’m working on troubleshooting the star connector, but there’s very little information on what wires do what, so it’s going to be whole new challenge. BLUF: I’ve done it all that everyone suggests, I’m starting on the star connector (under the steering wheel in my truck) if you have any guidance on how to troubleshoot those things, let me know.

 

[appzattak]

I had contacted all Mopar parts regarding that shifter that I bought from them, and in their notes it did not say anything about flashing the ECU, I'm wondering why the dealer told you they flashed the ECU after installing a new shifter? shifter? is the star thing you talk about the thing that's underneath the dash of the passenger seat? That's one thing I haven't switched out yet and was thinking about switching it out.

 

[Dlwashington98]

I had contacted all Mopar parts regarding that shifter that I bought from them, and in their notes it did not say anything about flashing the ECU, I'm wondering why the dealer told you they flashed the ECU after installing a new shifter? shifter? is the star thing you talk about the thing that's underneath the dash of the passenger seat? That's one thing I haven't switched out yet and was thinking about switching it out.

I just scheduled an appointment today with the dealership and when they ran my vin they said I had 2 recalls, one for the ecu flash and they said a shifter recall, so they’re going to try that to see if the issue is resolved. It’s scheduled for Monday so we will see.

 

[appzattak]

Last year I had two recalls done, I think one is related to the shifter where if your door is open it would stay in drive and after that flash or fix. If you're in drive and your door opens, it automatically goes to park, I'm guessing that's what that is, not the issue that we're having.

Keep us posted though.

 

[bball8383]

Last year I had two recalls done, I think one is related to the shifter where if your door is open it would stay in drive and after that flash or fix. If you're in drive and your door opens, it automatically goes to park, I'm guessing that's what that is, not the issue that we're having.

Keep us posted though.

Any luck fixing this issue? I have the same thing going on. I replaced the shifter module and my battery and still nothing. I'm also getting two more codes, U0140 (Lost communication with BCM) and P1C4E (an abs code which I don't have the ability to read). My actual shifter seems to be working fine. I can shift shift from P to R, N and D without a problem but I just don't want to risk driving it and having it go out.

 

[appzattak]

I still have this issue on the daily. I have no idea what to look at next. Lately what has been happening is it will flash the service shifter and the lights will go out momentarily and turn back and and seems to be good. Sometimes it will stay off for a bit but will come back on.