PARK SENSE/SERVICE SHIFTER CODES

[THDDad]

Can confirm. Replaced the Star connector and haven’t had any issues. FINALLY! ~$65 bucks and you can switch them out yourself very easily.

 

[wasney17]

I speak for a growing number of 2019 and up 5th Gen RAM 1500 owners. We are having serious electrical issues with the "PARK SENSE & SERVICE SHIFTER" systems. The Park Sense shuts off without warning, then turns back on along with a SERVICE SHIFTER message (and check engine light) appearing on the Dashboard Message Screen. There are no codes being held in memory, but yet our trucks continue daily to have these issues. They continue to shut off the PARK SENSE and or lock the truck into PARK...........WE NEED RAM TO GET AN AUTOMOTIVE ELECTRICAL DETECTIVE, NOW!!!!!!!....................So far I've have had to deal with the INADEQUATE, IMPROPERLY TRAINED employees, that cant find their butts with a map and both hands!...All RAM knows how to do is BREAK YOUR BANK ACCOUNT by throwing unneeded parts at your vehicle....I have spoken with numerous 5th Gen Ram 1500 owners recently, that are having this same ongoing electrical system issue, and the only thing any of us are getting out of RAM, is "WE DON'T KNOW WHATS WRONG, BUT KEEP GIVING US YOUR MONEY!"

I was dealing with this issue for 2 years!!!
New battery
New shifter knob
Programming nothing worked finally I took it to a 3rd ram dealer and they were really cool explained the problem to them and instantly they told me it’s probably the green star connector on driver side I took it there part was 60 bucks they charged me 250 total and finally my ram is alive no issues any more no service shifter and no park break sensors temporally unavailable so it’s been 5 weeks no lights 1st time in 2 years if this helps anyone!

 

[TM-RamRod]

I was dealing with this issue for 2 years!!!
New battery
New shifter knob
Programming nothing worked finally I took it to a 3rd ram dealer and they were really cool explained the problem to them and instantly they told me it’s probably the green star connector on driver side I took it there part was 60 bucks they charged me 250 total and finally my ram is alive no issues any more no service shifter and no park break sensors temporally unavailable so it’s been 5 weeks no lights 1st time in 2 years if this helps anyone!

Hi Wasney17,

I live in AZ and have recently been experiencing the same issues with my 2019 RAM Rebel 1500 . Have you had any more messages popping up on your screen saying to service shifter or park sensors temp unavailable? Did the Green Star Connector replacement work?

 

[Tyler54321]

New to the forum, my fix may not be for everyone but here is what has been the fix for me (as of now).

I started getting park sense unavailable which then progressed to service shifter, then progressed to getting both notices along with a check engine light. Downloaded a U001 which is a High Speed CAN Communication Bus error.

Replaced my Park Assist Module, ordered one directly through MOPAR and didn’t require a reprogram. But the problem stayed the same.
I checked the RF Module behind my back seat with no defect, checked all my fuses, checked all grounds running along the left side of the truck, had battery tested, checked alternator output, and could find nothing that would cause it to happen.

Two days ago I had the errors pop up, then decided to use it to my advantage and feel for harnesses that may cause it to go in and out. Pull my light assembly panel left of the steering wheel and grabbed the wires going to the star connector that’s mounted on the drivers side. I was able to get the service shifter to come on when moving the wires to the star connector.

I then bought a new star connector (Can Bus Connector) PN:68321746AA paid $86. Swapped it out and have not had the errors come back yet. I am an aircraft mechanic but this part was extremely easy to replace and can save hundreds rather than taking it to a dealership.

I will post an update if the errors come back, but for now everything is good!

Can confirm this worked for me as well. I have a 2019 Laramie 2wd with 70k miles. Started getting the front and rear park sense errors, which escalated to getting the ‘service shifter’ message, which then escalated to a bunch of dinging and throwing the check engine light. This all happened over a period of about 2 weeks. I replaced that exact part PN:68321746AA (it took me about 10 minutes) and I’ve driven the truck about 2k miles with no issues.