The 2013–2018 Ram 2500 & 3500 trucks with the 6.7L Cummins introduced SCR/DEF emissions systems on top of the EGR and DPF. These models are considered more reliable than earlier 6.7s thanks to refinements and continued use of the Bosch CP3 pump.
Still, these trucks are known for DEF heater failures, NOx sensor problems, turbo actuator issues, and injector wear as mileage climbs.
At DK Auto & Diesel Service in Magnolia, TX, we specialize in repairs and upgrades for 2013–2018 Cummins trucks used for work, towing, and performance.
Common 2013–2018 6.7 Cummins Problems & Symptoms
1. DEF System Failures (Heater & Pump)
• Symptoms: check engine light, DEF warning messages, limp mode
• Causes: DEF heater/pump failures in cold weather, crystallization buildup
• Fixes: DEF system testing, heater/pump replacement, updated components
2. NOx Sensor Failures
• Symptoms: emissions codes, poor fuel economy, limp mode
• Causes: failed upstream/downstream NOx sensors
• Fixes: sensor replacement with updated parts, ECU reprogramming
3. Turbo Actuator & VGT Issues
• Symptoms: low boost, turbo lag, actuator-related fault codes
• Causes: sticking vanes, actuator motor failure
• Fixes: turbo actuator replacement, turbo cleaning, rebuilds or upgrades
4. Injector Wear & Fuel System Problems
• Symptoms: rough idle, white smoke, poor mileage, hard starts
• Causes: high-mileage injectors, poor fuel quality, filtration issues
• Fixes: injector testing/replacement, CP3 inspection, fuel filtration upgrades
5. Transmission Limitations (68RFE & Aisin AS69RC)
• Symptoms: slipping, overheating, early failure under heavy towing or high horsepower
• Causes: torque loads exceeding stock designs
• Fixes: heavy-duty rebuilds, upgraded torque converters, valve body upgrades
How DK Auto & Diesel Fixes the 2013–2018 6.7 Cummins
- DEF system service & component replacement
- NOx sensor diagnostics & replacements
- Turbo actuator replacements & turbo upgrades
- Injector & CP3 pump testing and repairs
- Transmission upgrades for 68RFE & AS69RC trucks
- Preventive maintenance for long-term reliability
Schedule Your 6.7L Cummins Diagnostic in Magnolia, TX
If your 2013–2018 Ram 6.7 Cummins has emissions warnings, turbo actuator issues, or injector problems, trust DK Auto & Diesel Service for expert service.
Serving Magnolia, Montgomery, Conroe, The Woodlands, Tomball, Willis, and Spring.
Book a Cummins Diagnostic Today
FAQ About the 2013–2018 Cummins
Is the 2013–2018 Cummins reliable?
Yes — these years are considered the “sweet spot” because they still use the CP3 pump, which is more durable than the later CP4.
What’s the most common problem?
DEF heaters and NOx sensors are the most frequent failures, along with turbo actuators.
How long will these trucks last?
With proper maintenance, 350k+ miles is achievable. Many fleet and owner-operator trucks are still going strong.
