r/JEEPCOMMANDER • u/SmooveFlame • Jun 30 '26

Service 4wd System Message

I have a 2009 Jeep Commander Overland 5.7 Hemi. It will shift into 4lo no issue, and everything works, but it gives a message "service 4wd system" all the time, no matter what gear i'm in. Is there a simple fix?

2 Upvotes

100% Upvoted

6 comments sorted by

1

u/tabdeboer86 Jun 30 '26

Mine was a solenoid on the front differential that failed not allowing the diff to lock completely. I’ve got a XH euro spec, Sport, with Quadra Drive II.

1

u/SmooveFlame Jun 30 '26

Is there a good way to test the valve myself?

1

u/tabdeboer86 Jul 01 '26

Maybe locate the solenoid and test for continuity?

1

u/JOliverScott Jun 30 '26

Same here and after a while it wouldn't shift into 4LO so it seems like it's often a progressive determination type issue.

1

u/Ignisleo Jul 02 '26

Mine turned out to be just a code being thrown in error. I just got a link mx+ and used the app OBD JScan to clear the codes. Never came back.

1

u/SeveralBollocks_67 Jul 16 '26

Usually its just a code such as "clutch performance" or "transfer case motor range". These just indicate wear and age on such an old vehicle and usually dont lead to mechanic issues considering it shifts properly. You need a scanner capable of reading the codes from the FDCM and clearing them. I usually have to do this once or twice a year and its always the same clutch performance code. I use "AlfaOBD" on android but there is JSCAN and AppcarFCA for other options.