Chrysler/ Jeep P73 Campaign. - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 46 (permalink) Old 05-24-2015, 09:33 PM Thread Starter
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Chrysler/ Jeep P73 Campaign.

Chrysler has finally come up with a no-cost fix for the dreaded N23 Service 4WD low range inop. problems. It is called the P73 Customer Satisfaction Notification.

Here is a link: http://www.chrysler.com/universal/we...ce/pdf/P73.pdf

It is yet again a reflash of the FDCM module.

Dan

Last edited by Big Blue; 08-14-2017 at 04:37 AM. Reason: Thread title improperly labeled as a recall.
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post #2 of 46 (permalink) Old 05-25-2015, 02:34 PM
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I finally went ahead and had my transmission oil and filters changed 2 weeks ago. They did the N23 update - my 4 wheel low is working fine. Possibly this new one is for ones that may have a sluggish Transfer case motor??? I heard it includes a part? Need more input!! The recall specifically said QTII - ? Not QDII???

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post #3 of 46 (permalink) Old 05-25-2015, 03:08 PM
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It specifically said a "QTII Transfer Case", since QDII has the same transfer case, logically it would also be covered. But yes, they could have been more clear, and I also would worry that they are only going to cover QTII and NOT QDII.

I don't "think" (meaning I could be wrong) the problem is a sluggish shift motor. What I read was a defect in the FDCM module. The defect could cause the FDCM to shift the XFR case into neutral at a random time, that lead to a few Commanders rolling down hills. I think the NHTSA got involved.

The N23 update was suppose to have a self-test to spot the defect and disable the FDCM before it could become a safety issue. Either the overwhelming majority of FDCM's were defective or the N23 update's new self-test to sensitive, cause it was resulting in an overwhelming majority of vehicles having their FDCM disabled shortly after doing the N23 udpate, meaning they could NOT shift into 4LOW or Neutral.

Perhaps the N73 update will have a better self-test that will finally identify if the FDCM really is defective or NOT. Thus if you have a good FDCM it won't be disabling the FDCM in the future when its NOT necessary. And, if your FDCM is actually defective it will identify it more positively and thus you can replace it and get a proper functioning vehicle. You would hope, if the FDCM is identified as defective, Chrysler would replace it for you free of charge, which might account for the talk about a new part?

Yes, one of the NV245's common problems was oil leaking past the seal at the shift motor and ruining shift motors that is an expensive repair. That does confuse the issue. Might want to check that motor on every oil change, and if you spot leaking oil, repair the seal right away before the motor is ruined by leaking oil, and avoid having to replace the motor with the seal.
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post #4 of 46 (permalink) Old 05-25-2015, 10:25 PM
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I guess we won't know for sure until several xk's have a history with the p73 recall, please keep us informed.
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post #5 of 46 (permalink) Old 05-30-2015, 01:20 PM
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I have had my fingers crossed all this time while you guys have been complaining about the dreaded N23 malfunction. Well, I may have finally become a victim. I was doing some off road course and while I was in regular mode (4 Hi/4 wheel drive) I got the rear passenger wheel off the ground and the wheel started spinning, next thing I know the ABS, traction control, and BAS lights come on along with a "ding" and "service 4wheel drive" display. I tried shifting into 4Lo and it would not let me. I was able to take the bypass and get out of the course. I am now sitting at the dealer to get this P73 update. When he put his scanner on the OBD it showed on his tablet that I needed the P73 update (along with the ignition switch which I am still waiting for). I have a QTII. Anyway, I will keep you guys updated.
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post #6 of 46 (permalink) Old 05-30-2015, 03:43 PM
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Ok, done. It was a pretty quick fix, the dealer didnt take long at all. Everything seems to be working ok. I put it in 4Lo and it let me. I drove about 100 feet that way just fine then switched it back. I wont be able to test it off road til tmrw. And best of all NO CHARGE!
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post #7 of 46 (permalink) Old 05-30-2015, 11:58 PM
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Good to know that someone has had #73 done, let us know tomorrow and with a few weeks on the clock.
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post #8 of 46 (permalink) Old 05-31-2015, 07:50 PM
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I have QD-II. I get the service 4 wheel drive light as soon as I try to engage 4lo. I recently made a post about this asking for help. To my knowledge, (only owned the commander for a year) my commander has not had any of the recalls done. I was afraid to have anything done until I researched it more because I read so many horror stories of the recall fix actually making things much worse. So with that being said, should I have the N23 done? Or go straight to the P73?

Last edited by music_man185; 05-31-2015 at 07:51 PM.
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post #9 of 46 (permalink) Old 05-31-2015, 08:27 PM
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If your Commander had been to dealer since the N23 recall was released, likely it had the update done.
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post #10 of 46 (permalink) Old 06-01-2015, 09:13 AM
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If they are doing the P-73 as a fix for the N-23, I don't think you have a choice, they will do the P-73
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