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Discussion Starter · #1 ·
Has anyone else had the P2002 engine code (Diesel Particulate Filter Efficiency Below Threshold B1)? My 2014 GC Diesel has had this error popping up for a while. I manually clear it, since during a regen it's suppose to burn off buildup, but the code seems to return. New DPF is ~$3k. At 57k miles its out of warranty, but if I need to replace it I may buy an extended warranty. Rear lift gate won't stay up any longer either after it opens, so another reason I'm eyeing an extended warranty...
 

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Discussion Starter · #3 · (Edited)
Yep had both P2002 and lift gate. P2002 was caused by a DPF pressure sensor leak from the small steel pipe on the DPF canister pre filter (so measures high pressure side).
Replaced pipe and union fitting and all good.
I changed the lift gate gas strut with a new one purchased from Ebay and no further problems
Some warranty companies regard the DPF as a consumable part so i would check that it is covered.
Thanks for the info. These have been nuisances that happened again during a trip this weekend and decided it's time to fix them. I haven't looked at the GC close enough to find the DPF, etc. but figured I'd start looking tonight after work.

For DPF, how did you know you had a leak in the steel pipe, and not a sensor failure, or bad DPF? The 2014 parts diagram shows the hard pressure lines as part of the DPF, but 2015 shows them separately as part of the differential exhaust pressure system (Differential Exhaust Pressure System. Fits: 2015 Jeep Grand Cherokee Limited 4x4, 3.0L V6 Turbo Diesel, 8-Spd Auto 8HP70 Trans | Mopar Parts Source). So you just replaced the front hard line?

For lift gate, did you replace the non-actuated side (68165052AB ~$25) or the motorized side (68158561AA ~$170)?

Thanks,

Mike
 

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Discussion Starter · #5 ·
Hi
My Jeep is a 2011 UK model so the DPF setup may be different to yours but i could clearly see a soot stain on the transmission from where it was blowing out of the pipe union. I ordered the pipe as an individual part but unfortunately do not have the part no.
I changed only the non-actuated side gas strut due to the lift gate dropping in cold weather.
The 2014+ diesel design (post Fiat buyout) is probably significantly different than 2011. Looking at the parts diagrams/ebay parts, the DPF is one assembly, but it looks like the pressure sensor and hard lines are separate (and significantly less $$).

I crawled under my DGC to try and look at the DPF last night. Didn't see anything wrong at first glance (i.e. soot accumulation), but to really get a good look at it and the pressure lines on top, I need to drop the skid plates and maybe even the DPF. So that will be a job for this weekend.
 

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Discussion Starter · #7 ·
Dropped the skid plates and panels. I don't see any soot/abnormal wear indicating any sort of leak. All of the fittings seem to show even dirt/dust/wear. I did notice that the oxygen sensor outer sheathing is peeling back at the DPF and individual wires are visible, but I don't see any damage to those wires.

Someone pointed out that this may be covered under either/both the fed and California emissions warranties. Think I'll take it to the dealer and see if it's covered before I start replacing it myself.
 

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Discussion Starter · #8 ·
Took it to the dealer today. Besides the P2002, they said they also saw two other engine codes P1E0C (empty fuel tank, even though it's 1/2 full) and P0585 (Speed Control Switch Correlation Error) and claim these point to EGT and Catalytic Temp Sensors. They wanted $490 to change two $30 sensors (that they didn't even have on hand).

I'm guessing they are basing their diagnostic on this service bulletin (http://www.wk2jeeps.com/tsb/tsb_wk2_1809415.pdf), which says to update the PCM/TCM/RFH/IPC (which they did as part of the S27 recall) and inspect/replace those sensors as required.

Also found this thread on the Ram EcoDiesel (ED Emissions Warranty). DPF is covered by US fed emission warranty (e-mails with someone at the EPA, so could be useful if someone else gets pushback on diesel emission related warranty issues. Sensors aren't covered, but other emission items are.
 
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