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Check Engine - DEF problems

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170K views 267 replies 86 participants last post by  John Jeep  
Sorry to say, but I have to join most of you on the check engine light with no messages???
10k miles and we have had our share of sensor issues.
ALL work completed by Jeep dealer, ALL mopar parts, including DEF.
Engine light comes on / off at will.
Service said it's nothing to worry about until next service.
Was told its most likely another software update???
WE even received a DEF message when it was topped off with mopar branded product. Really?
 
We had the incorrect DEF message, again and check engine light again.
We are slightly over 15k miles. Our service center lost their diesel tech and sent us to another.
Wow, the new place really knows their stuff. Performed 4x updates that the previous people overlooked in the last couple of months.
All was fine, until the engine light returned with no messages???
All mopar branded DEF and all service by dealer.
Up side, my wife is reporting over 28 mpg since last service and updates!
Our oil and DEF still have lots of life and we are getting ready to pull 6,000 lbs 1500+ miles. What to do about that damn engine light?
 
The EVIC doesn't normally show a message when the CEL comes on. Only DEF and Regen issues have messages. You need an OBD2 scanner to check the codes if the CEL comes on. If you are getting a P20EE, you may have a failing Catalytic Converter. You need to get it diagnosed so you can get in line to wait for a new Cat...they are heavily back ordered since an improved Cat is being released soon. You can drive it in the meantime.

You are dead on! In for CEL, again and code was P20EE. Service manager had a new Cat Converter marked for someone else, but installed it on ours due to all the issues and we are heading out for a long trip.
We have hardly used any DEF since last LOF when we then topped off with 8 gals. The service tech and manager stated all the stop/go daily commuting is not helping???

They also recommended getting a code reader, read the code an clear out if necessary.
WE are slightly over 16k miles and the CEL has been on more than off since purchasing.
We have had 2 LOF (lube, oil, filter) and topped off with only Mopar branded DEF.
FYI...latest recall is P64 Reprogram Steering Column released recently.

Seeking recommended code reader ASAP before trip in 2 days.

Where can I get the list of codes?
 
latest update since CEL was addressed and most recent updates completed. New service department replace cat converter.
We just returned from an 1800 mile trip, pulling our 6,000 RV/trailer.
NO cel!!!
We also averaged 15 mpg when pulling and exceeded 29 mpg for 200 miles when not pulling last week.
Love the new Bluetooth scanner and iPhone app.
 
Is there an iPhone OBD scanner app? Please see note below.

RS
Yes. Here's the link: http://actronuscan.com/

Paid about $78 at AutoZone and downloaded app for another $15.
Pair the two and you can add as many vehicles as you wish.
I like the idea of capturing the live data and scans to send to my service tech.
 
Agreed. I was paying $17 for 2.5 gallons.
My service dept had me purchase a code scanner, bluetooth and if the CEL comes on, I can send them the data.
Also, at 10k miles, they change the cat converter and we have been CEL free for over 12k miles!
 
Purchased GC Overland diesel Feb, 2014. Loved the vehicle and used is hard until 2 weeks ago when (at 21,000 miles) I was beset by the same series of issues (DEF) that have plagued many forum members. I was on the road, called the dealership where I purchased the vehicle and which has performed all service. They said they couldn't help me even if I got it there as they were too busy, scheduling 3 weeks out. But...I should get it to a dealer asap...gee thanks. I did find a dealer close to where I happened to be. Though they too were busy, they arranged a rental and sent me on my way promising to have it fixed when I came back through 5 days later. They installed a new DEF pump and I went on my way. 1 week later check engine light and same DEF message. I again called my dealership and was told they couldn't/wouldn't help me...thanks again. I took it back to the dealership that replaced the DEF pump (well over an hour out of my way) and they again arranged a rental and promised they would get to the bottom of the problem and get it fixed. Yesterday, they installed a new computer per Chrysler protocol but apparently upon test drive realized this did not solve the problem. New CAT now on order, to be delivered and installed tomorrow(keeping my fingers crossed).

In the meantime I had a conversation with the service manager at my dealership. He frankly admitted that they simply don't have the capacity to keep up with service demand. Only 2 of his 26 technicians are diesel certified, and given the number of issues with the 2014 diesels they are totally backed up. This is the top selling dealership in Colorado. Jeeps of all shapes and sizes are 'selling like hot cakes" and though a whole new service facility has been promised, so far, nothing. SO if you live in greater Denver, good luck getting your issues addressed in a timely fashion. Thank God for the friendly small town dealer with the diesel tech and rental agency on site. Oh and my extended service contract.

If the new cat does not permanently solve the problem, I too will bail on Jeep. If I'm going to pay a luxury price, I might as well get luxury service. Sure will miss that torque and off-road capability.
After our cat was replaced...NO issues at all. Well over 30k miles, finished a 3300 mile trip, towing over 6k pounds from south FL to northern Il. All ran perfect and averaged 15MPG.