DPF code (engine light) at 55K

[Schnee]

2022 Ecodiesel, bone stock drive train and exhaust. Just past 55K miles, and at the end of 1.5 hour drive two weekends ago my engine light came on. Scanner code said problems with DPF, and the code could not be cleared by my mechanic friend's scanner.

Good news is the EPA requires the diesel exaust system to be warranted for 8 years/85K miles. Dealership read the code last Tuesday to confirm the code and ordered a new DPF sensor. Decided the first one they'd ordered and installed was faulty and ordered another on Thursday. My truck was in the shop from Tuesday to Friday.

After 90 miles two days ago, the engine light is back on, I'm guessing for the same reason.

I've had no problems with my Gladiator to-date, and I /really/ like the EcoDiesel. Most of my trips are at least 45 mins long, but there's always some short around-town. I'm anxious about the repairs and longer-term about the engine, now. I'd like to keep this truck for ~200K miles -- should I be making other plans?

Since the exhaust system is under factor warranty, they're giving me a rental car. Will update this thread as I learn more.

Sponsored

 

[DylanM]

I'd be curious to hear what code was/is kicking out and what sensor was replaced (twice).

 

[Brad.Clarkston]

I've also got a 2022 diesel ruby at 55.6k miles. We've gone from Kansas City to Denver multiple times with a trailer and just did a week at South Dakota with a trailer without any issues.

The only time I had the check engine light come on was running off road in the Badlands. I took a pretty steep drop a bit to fast and hit the bottom kinda hard. Funny enough it turned out to be the fuel cap sensor wasn't happy. Tightened the cap up and the light never came back after a restart.

Hopefully they get you fixed up this time.

 

[Schnee]

Here's the only detail I have from the service invoice. (Sorry they are YELLING):

CUSTOMER REPORTS THE CHECK ENGINE LIGHT IS ON. DIAGNOSE AND ADVISE.​

CAUSE: EVERIFIED CUSTOMER CONCERN. CONNECTED THE SCAN TOOL AND CHECK FOR DTC'S AND HAVE P2002-00-DIESEL PARTICULARE FILTER EFFICIENCY BELOW THRESHOLD.​

CHECKED THE WIRING AT THE SENSOR AND WIRING IS GOOD. CHECKED FOR ANY OTHER DTC'S RELATED TO THE DPF AND NO OTHER DTC'S IN THE SYSTEM. CHECKED FOR SOFTWARE UPDATES RELATED TO THE CONCERN AND NO UPDATES ARE AVAILABLE. RECOMMEND REPLACING THE PARTICULATE MATTER (PM) SENSOR AND RECHECK.​

CORRECTION: REPLACED THE SENSOR AND VERIFIED THE REPAIR.​

08CHZ40 CHECK ENGINE LIGHT​

Stay tuned for update after tomorrow when I drop it off.

 

[brsnow2585]

I've got a '22 also, I drive mixed, wheel some, tow some. I've only had one time I can recall that mine threw me the regen message, luckily I was on the interstate and had another 2hrs in front of me. I know the in town short trips make regen happen more often. Just sharing my experience, sounds like it might be along the same lines.

 

[oldironsights]

Sounds as if the mechanics are praying the sensor replacement gets the truck out of their shop & runs long enough to get the owner to go elsewhere.
I have seen that in my shop where the mechanic knows what is wrong, but will replace just the sensor & call it a day, delaying the repair & hoping another mechanic gets stuck with it.
I used to repair/replace many, many DPF/EGR/SCR systems on revenue vehicles.
Glad I'm retired.

 

[DylanM]

The service manual troubleshooting for a P2002-00 code calls for inspecting the DPF for damage/cracks, and if none found to replace the PM sensor. Sounds like the mechanics are doing what they're supposed to do so far (assuming they actually inspected the DPF). Now if they jumped straight to replacing the PM sensor twice in the hopes it'd be an easier/cheaper fix, then they put the cart before the horse.

If the DPF checks out good and replacing the PM sensor doesn't clear the fault, then you're supposed to inspect for wiring/connection issues between the PM sensor and PCM, and if no problems are found to then replace the PCM.

 

[brsnow2585]

I'd wonder who makes the sensors. I had a really rough run with sets of Bosch sensors on a Blazer being so far out of range from each other, they wouldn't work together, those were O2 sensors in the exhaust track. I found a lot of other experiences like that too while I was trying to run it down, even sensors in the same lot number weren't playing nice in the sandbox.

 

[biodiesel]

Most likely, the DPF is cracked internally and will need to be replaced. For some reason, a good number of DPFs have this issue and I'm not sure why. I think it's a manufacturing/production issue. You either get a good one or you don't.

 

[Schnee]

Here's the lates from the dealership after dropping my EcoD off this morning:

Inspection Notes:

RECOMMEND REPLACING EXHAUST GAS TEMPERATURE SENSORS 1/2 AND 1/3 - SEIZED IN DPF - NOT COVERED UNDER EMISSION WARRANTY​

​

RECOMMEND REPLACING DIESEL PARTICULATE FILTER - CHECK ENGINE LIGHT - COVERED UNDER EMISSION WARRANTY​

​

They are saying the Exhaust Gas Temperature Sensors are NOT covered under the EPS's emission warranty. Cost for replacing those is $339.44. (DEFINTELY should be.) I got the number for the regional service manager to take it up with them.

Anyone have guidance for forcing the manufacturer to cover these sensors under the EPAs 8yr/85K miles emissions warranty?

 

[Schnee]

For future readers, I have also opened a claim with Jeep Wave, and will use the following reference from the EPA's official website for reference. Seems pretty bright-line that the EGRs are covered.

§ 85.2103 Emission warranty.

(d) An emission defect warranty applies as follows:​

....​

(iii) Components related to exhaust gas recirculation with compression-ignition engines.​

For now I have a claim number with Jeep, and a potential ~$300 bill if I can't get them to budge.

 

[kb5zcr]

Hmmm, the

For future readers, I have also opened a claim with Jeep Wave, and will use the following reference from the EPA's official website for reference. Seems pretty bright-line that the EGRs are covered.

§ 85.2103 Emission warranty.

(d) An emission defect warranty applies as follows:​

....​

(iii) Components related to exhaust gas recirculation with compression-ignition engines.​

For now I have a claim number with Jeep, and a potential ~$300 bill if I can't get them to budge.

Hmmm, the EGR (exhaust gas recirculation) is different than the DPF (Diesel particulate filter) which is what was originally having issues.
Which part are you referring to?

 

[Lost1wing]

Damage from a faulty covered emissions component should be covered. Unless they are saying the EGT sensors were the reason for the DPF code. Now if they damaged the EGT sensors trying to remove them, that's another story. I have never damaged an EGT sensor trying to remove it. More like the incompetence at the dealership caused the damage.

 

[rharr]

Did the dealer even try a forced regen to see if it clears out the code? Reduced efficiency can be from a clogged DPF, which is why the service tool has a forced regen setting.

Mine threw a fit on a road trip once and did a forced regen on the side of the road and it's been fine since.

 

[Schnee]

Quite a bit new to share today on the DPF issues I've been having. After opening a case by calling Jeep Wave, they called me back. I had a level-headed but stern conversation with them. The gentleman tried to just give me the party line "sorry, not covered." But I presented him with enough info that he was rattled. I escalated to his manager, so he scheduled a call back from the manager. Then called me back 10 minutes later asking for another day to work things through on his side. But I have a case number.

For posterity, I followed up with this email to him:

<Name removed>

Thank you for calling me today. Here are the specific details I shared with you on our call at 1:10 PM Pacific time, along with the relevant links:

To be clear, I am appealing that Stellantis/Jeep cover or reimburse any and all charges related to replacing the front and center diesel exhaust temperature sensors, that are being replaced in conjunction with the diesel particulate filter. The dealership has already acknowledged that the DPF sensor and DPF itself are "covered under the 8/80 major emission comp warranty" ... "at no cost to the owner." Per the attached invoice (PDF) the charges to replace the sensor will amount to $339.44.

Summary of events:

• On October 18, 2025, the engine light came on. I returned home immediately and stopped driving the vehicle.
• On October 21, 2025 I drove the vehicle to the Seattle Jeep dealership. They scanned the code and said there was a problem with the DPF sensor, confirming it would be replaced under the EPA's mandated 8 year/80,000 mile warranty exhaust systems for light-duty diesel (.
• Per <named removed> in their service department, the first sensor they ordered and installed was found to be faulty. They ordered a second sensor, and the vehicle was returned to me on Friday, October 24, 2025.
  Here is the detail from the service invoice:
  CAUSE: EVERIFIED CUSTOMER CONCERN. CONNECTED THE SCAN TOOL AND CHECK FOR DTC'S AND HAVE P2002-00-DIESEL PARTICULARE FILTER EFFICIENCY BELOW THRESHOLD.
  CHECKED THE WIRING AT THE SENSOR AND WIRING IS GOOD. CHECKED FOR ANY OTHER DTC'S RELATED TO THE DPF AND NO OTHER DTC'S IN THE SYSTEM. CHECKED FOR SOFTWARE UPDATES RELATED TO THE CONCERN AND NO UPDATES ARE AVAILABLE. RECOMMEND REPLACING THE PARTICULATE MATTER (PM) SENSOR AND RECHECK.
  CORRECTION: REPLACED THE SENSOR AND VERIFIED THE REPAIR.
  08CHZ40 CHECK ENGINE LIGHT
• After approximately 90 miles of freeway driving, the engine light came on again on Saturday, October 25, 2025.
• I returned with the truck to Seattle Jeep on Tuesday morning, October 28, 2025. The dealership sent me this link: <link removed>
• <name removed> said the system was telling her the DFP was covered under the 8/80 major emission comp warrant, but their system was telling her that the two diesel exhaust temperature sensors (front and center) were not covered.
• That is when I placed my call to Jeep Wave to appeal the coverage.

Why would the original DPF sensor and the DPF filter itself be covered, but the two temperature sensors that are an integral component of the diesel engine's exhaust system not be covered under the same 8/80 major emission warranty?!

It is clear that both the current EPA regulation/law and the regulation/law at the time I took delivery of the Jeep both clearly mandate that the sensors are covered.

• The link to the current law is here: https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-85/subpart-V/section-85.2103
  See § 85.2103 Emission warranty, subsection (d)
• The link to the EPA's law in force at the time I took delivery of the vehicle is here: https://www.ecfr.gov/on/2022-03-01/title-40/chapter-I/subchapter-C/part-85/subpart-V/section-85.2103
  See § 85.2103 Emission performance warranty, entire regulation but subsection (a) (3) in particular.
  Note also that the regulation in-force in 2022 when I took delivery of the vehicle is broader, MORE inclusive, and without time limits ("any time during its useful life") for the manufacturer to to fix "nonconformities resulting from the failure of components which have been installed in or on the vehicle for the sole or primary purpose of reducing vehicle emissions..."

It's not reasonable to exclude the temperature sensors under the 8/80 warranty, because they are an integral part of the system and proper functioning of the exhaust system that includes the diesel particulate filter and the diesel particulate sensor, both of which Jeep has already acknowledged are covered under warranty. I therefore respectfully request that costs to repair the sensors be covered.

Sponsored