The third-generation 3.0L EcoDiesel V6 was introduced in 2020 for the Ram 1500 DT and the Jeep Wrangler JL, alongside the Jeep Grand Cherokee. FCA/Stellantis redesigned the engine for improved towing and efficiency, but it quickly became known for CP4 fuel pump failures, camshaft & lifter problems, and emissions system issues.
At DK Auto & Diesel Service in Magnolia, TX, we provide diagnostics, repairs, and upgrades for all third-generation EcoDiesel trucks and SUVs.
Common 2020–2022 EcoDiesel Problems & Symptoms
- CP4 Fuel Pump Failure
- Symptoms: sudden stalling, no start, metal shavings in fuel system
- Causes: CP4.2 high-pressure pump design flaw — prone to internal wear and failure
- Fixes: CP4 replacement, CP3 conversion kits, complete fuel system replacement if contamination occurs
2. Camshaft & Lifter Failures
- Symptoms: ticking noise, misfires, loss of power, metal in oil
- Causes: lifter roller failure wiping cam lobes, worsened by high idle and towing use
- Fixes: camshaft & lifter replacement, upgraded valvetrain components, strict oil maintenance
3. DEF & NOx Sensor Failures
- Symptoms: DEF warning lights, limp mode, poor fuel economy
- Causes: DEF heater/pump failures, faulty NOx sensors
- Fixes: DEF system service, NOx sensor replacement, ECU updates
4. Injector Wear & Fuel Contamination
- Symptoms: rough idle, smoke, poor mileage, hard starting
- Causes: injector nozzle wear, debris from CP4 pump failures
- Fixes: injector testing & replacement, upgraded filtration, full fuel system flush if contaminated
5. Timing Chain & Guide Wear
- Symptoms: rattling at startup, engine codes, loss of performance
- Causes: tensioner or guide wear in higher-mileage engines
- Fixes: timing chain service with updated tensioner and guides
How DK Auto & Diesel Fixes the 2020–2022 EcoDiesel
- CP4 fuel pump replacement & CP3 conversions
- Camshaft & lifter replacements for ticking failures
- DEF & NOx sensor diagnostics & replacement
- Injector testing & fuel system repairs
- Timing chain inspections & service
- Preventive maintenance for long-term reliability
Schedule Your EcoDiesel Diagnostic in Magnolia, TX
If your 2020–2022 Ram 1500 or Jeep Wrangler/Grand Cherokee EcoDiesel is suffering from ticking, fuel system warnings, or DEF issues, bring it to DK Auto & Diesel Service.
Serving Magnolia, Montgomery, Conroe, The Woodlands, Tomball, Willis, and Spring.
Book an EcoDiesel Diagnostic Today
FAQ About the 2020–2022 EcoDiesel
What’s the biggest problem with this generation?
- The CP4 fuel pump failure is the most catastrophic. The cam & lifter wear issue is also common in higher-mileage trucks.
Is the EcoDiesel reliable after repairs?
- Yes - many owners have strong results after switching to CP3 fuel pumps and addressing lifter issues.
How long will these engines last?
- With proper maintenance and updated components,
200k–250k miles is realistic.
