| Engine | Used in | Years (model years, per sources) |
|---|---|---|
| 3.0 EcoDiesel | Wrangler Unlimited (JL) | 2020 to 2023 per Stellantis and Diesel Army |
| 3.0 EcoDiesel | Gladiator (JT) | 2021 to 2023 |
| 3.0 EcoDiesel | Grand Cherokee | 2014 to 2019 |
One source lists the Wrangler diesel from 2021; Stellantis announced a 2020 Wrangler EcoDiesel. Symptoms and CP4 notes on the Ram EcoDiesel page apply.
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Common to all diesels
These apply to Jeep EcoDiesel engines too.
- Hard start when cold
- Cranks, will not start
- White smoke
- Black smoke
- Blue smoke
- Low power / limp mode
- Rough idle
- Water in fuel light
- Fuel in the oil
- Overheating when towing
- Losing coolant
- DPF and regeneration
- Cold-weather gelling
- DEF / SCR faults
- NOx sensor problems
- Clogged EGR valve
- Turbo whistle / boost leak
- Injector knock
- Wet stacking
- Glow plug / grid heater failure
- Hot transmission when towing
- Fuel filter restriction
- Air in the fuel
- Oil consumption
- Crankcase blow-by
- Cavitation / liner pitting
- Maintenance basics
- Winter diesel prep
- Buying a used diesel
- Is a DPF/EGR delete legal?
Where this comes from
- Stellantis media: 2020 Jeep Wrangler EcoDiesel
- Diesel Army: Looking back at the EcoDiesel Wrangler and Gladiator
- DieselHub: 3.0 EcoDiesel
- Wikipedia: EcoDiesel
Last reviewed 2026-10-19. General information only: confirm with your service information and a qualified diesel technician.