I've had my 2014 in 4 times on check engine light. Showing exhaust system codes. They went through entire DEF system and finally found crystals in or near DEF injector. Replaced injector. Only made it 40 miles before Ck engine is back on. Headed back to dealer this week. Started all this at maybe 3000 miles. 7400 miles now. Thoughts? Others experiencing this?
RobbWood
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FYI...A new TSB was released today that addresses emissions related issues...specifically the P20EE and related codes associated with the SCR/DEF system. It is listed as a Rapid Response TSB and should be performed on ALL 2014 GC diesels.
Here's a copy of the TSB:
http://www.wk2jeeps.com/tsb/tsb_wk2_1801814d.pdf
Here's a copy of the TSB:
http://www.wk2jeeps.com/tsb/tsb_wk2_1801814d.pdf
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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.
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A bad Cat alone will not put your vehicle in limp mode. A DEF system failure is what caused the countdown. The DEF system clogs when the Cat starts to fail and the NOx sensor doesn't call for enough DEF flow. Low flow allows the DEF to chrystalizes and clog. The clogged DEF causes the countdown.
Have then clean, fix, and test your DEF system for flow. Flash the latest TSB which (I think) has changes to the DEF injection flow which prevents clogging. Once the DEF is functional, you can drive with a bad Cat. You will get a P20EE code that sets the CEL but causes no harm.
A redesigned Cat is coming. Last I heard it may be mid-Dec or later. Fix the DEF and drive it.
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That code pertains to a bad NOx sensor. Have they changed the sensor yet? I suspect they were told to try the TSB first before swapping NOx sensors.
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The new TSB corrects algorithms in the ECM related to emissions but...it doesn't "fix" a bad Catalytic Converter. I suspect the prior algorithm actual damages the Cat. Mine had to be replaced.
In gas engines, a poorly tuned fuel system due to a failed sensor can kill a Catalytic Converter. Its the #1 cause of cat failure. I suspect our diesels are somewhat the same. Too much EGR, overly rich conditions during regen, incorrect DEF dosage...could cause failure and I suspect they have made adjustments in the latest TSB.
I would advise getting the TSB as soon as possible.
In gas engines, a poorly tuned fuel system due to a failed sensor can kill a Catalytic Converter. Its the #1 cause of cat failure. I suspect our diesels are somewhat the same. Too much EGR, overly rich conditions during regen, incorrect DEF dosage...could cause failure and I suspect they have made adjustments in the latest TSB.
I would advise getting the TSB as soon as possible.
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Listed as one of the top reasons for failure:
http://catalyticconverter.org/failure/index.htm
Goggle search...plenty to read:
https://www.google.com/search?q=the...9i57.18250j0j4&client=ms-android-verizon&sourceid=chrome-mobile&espv=1&ie=UTF-8
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Mine would run 170 miles before the P20EE code would set the CEL after each repair attempt. I am getting mine back this week also. Hope it's fixe this time.
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I recommend the Scanguage2 which is available at most auto parts stores (Autozone, Advanced Auto, etc). Its a guage you can locate in your center console.
As a bonus, You can program it to monitor the DPF temperature and watch when it is trying to regen the DPF. Short trips are rough on the DPF and SCR systems. I'd recommend a 20 minute highway trip every few days if possible. Otherwise the DPF will fill up with soot and not burn it off as designed.
As far as the DEF injector goes, be very careful about the quality of your DEF that you add. Make sure you don't introduce any impurities...not even a trace...into your DEF tank. The deionized solution will form chrystals if ANY ionized materials are introduced. Even water and air are ionized, meaning they have trace elements that conduct electricity. Wipe fill noozles clean and don't leave the DEF cap off for any longer than necessary.
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Bad Catalytic Converter. Just about guarantee its the P20EE code. Its ok to drive it if you have to wait on a Cat.
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Your Case Manager is uninformed or lying There are tons of complaints and issues regarding DEF warnings and P20EE codes. This forum is pretty dead. Check a forum with more owners and you can read for days.
The Catalytic converter design is faulty on all 2014's and the DEF system is prone to clog. My service fiasco lasted 72 days. I have 26k miles now and all is well but at 20k, I had a "Bad DEF See Dealer", then a "no start in 200 miles countdown" and P20EE codes. A DEF pump and Injector, DEF system cleaning and refill, and finally a new Cat fixed everything. Part of the delay was due to the dealer, in all fairness.
A new Cat design is coming. Many are reporting that repairs are being delayed until then. If you only have a bad Cat, drive it. The CEL from a P20EE is not harmful.
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You can drive past 0 on the countdown, you just can't restart. Might want to make your next trip a dealer visit.
They haven't solved the DEF issue yet. Have them perform a flow test. If it flows DEF through the injector to spec, you may have a bad sensor. Otherwise, if it's flowing to spec, you should be ok.
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Frank, sounds like your dealer knows their stuff. The DEF flow test is the right diagnostic and I am impressed that they communicated the results to you.
Let us know if you notice any changes in operation with all the updates. I've had all of them except the latest ECM rev D emmisions update that was just released. You may notice your shift points have changed based on torque demand. Mine downshifts sooner instead of holding a higher gear when I accelerate. Some like it, some don't.
Let us know if you notice any changes in operation with all the updates. I've had all of them except the latest ECM rev D emmisions update that was just released. You may notice your shift points have changed based on torque demand. Mine downshifts sooner instead of holding a higher gear when I accelerate. Some like it, some don't.
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You must report a symptom that a TSB addresses to have it applied unless it is classified as an RRT. Then it is required. Some dealers will provide the reason for you and apply all TSBs just to keep you updated and generate billable shop time. I consider those techs as the good guys.
The latest ECM TSB is emissions related and an "RRT" which means ALL diesels get it. They should have applied it since it was in the shop. Maybe they misread the bulletin.
The latest ECM TSB is emissions related and an "RRT" which means ALL diesels get it. They should have applied it since it was in the shop. Maybe they misread the bulletin.
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ELM327 Bluetooth to OBD2 adapter with the Torque app on Android. $30 total.
Also, I have a Scanguage2 which is a configurable multiguage that also reads/resets codes. $150
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Are you guys with failed Catalytic Converters washing your Jeep' s underside with a high pressure sprayer or spraying water down the tailpipe while the tailpipe is hot? Look at the factory duels from behind and tell me where water will go if it enters the tailpipe. The pipes angle down to the Cat. If your vehicle was regening or just finished before you washed it, sudden quenching of the ceramic honeycomb structure which is still at 1200°F inside the Cat can cause it to crack. Go do some reading before you tell me otherwise. Thermal stress is one of the top reasons a Cat can fail prematurely.
There has to be a reason our Catalytic Converters are dying at this rate.
There has to be a reason our Catalytic Converters are dying at this rate.
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Guys, get a code reader. If you are getting a P20EE intermitantly, you most likely have a Catalytic Converter that is operating marginally. It will clear after a few drive cycles then return since it is barely passing the onboard diagnostic test which occur as you drive.
This is a documented issue. Jeep is aware of it.
This is a documented issue. Jeep is aware of it.
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Update: Mine was fixed with a Catilytic Converter replacement. They also replaced a bad DEF pump.and DEF injector that was clogged with DEF chrystals, and drained/cleaned the DEF tank and lines.
I've driven 1000 miles error free so I think I am out.of the woods on this issue.
I've driven 1000 miles error free so I think I am out.of the woods on this issue.
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P20EE came back after 90 miles. I'll post when I know more tomorrow.
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This is common cause of the P20EE code that sets the Check engine Light and ultimately disables the vehicle. I was told that the mileage countdown to no restart has been changed in a recent TSB but can't confirm it.
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