The Ram EcoDiesel has earned a reputation for combining impressive fuel economy with strong towing capability. However, not all model years deliver on this promise. Some Ram EcoDiesel trucks have become notorious for serious mechanical issues that can lead to repair bills exceeding $7,000 before reaching 80,000 miles.
As an experienced mechanic who has worked with these engines extensively, I’ve compiled this comprehensive guide to help you identify which Ram EcoDiesel years to avoid. Understanding these problematic models can save you from significant headaches and expensive repairs down the road.
Key Takeaways: Ram EcoDiesel Years to Avoid
- Avoid 2014-2016 Models: These early Ram EcoDiesel years suffer from serious mechanical and emissions system failures.
- High Repair Costs: Owners frequently face repair bills exceeding $7,000 for issues like fuel system contamination and engine damage.
- Common Problems: EGR cooler leaks, oil cooler failures, and emissions system malfunctions plague these model years.
- Better Alternatives: 2017 and newer models show significant improvements in reliability and performance.
- Critical Maintenance: If you own a problematic year, following strict maintenance protocols can help mitigate potential issues.
2014 Ram EcoDiesel: The Most Problematic Year
The inaugural year of the Ram EcoDiesel introduced a promising concept but delivered numerous mechanical failures. As the first model year, the 2014 Ram EcoDiesel became the testing ground for technology that wasn’t fully refined.
Major Mechanical Issues
The 2014 Ram EcoDiesel suffers from critical fuel system failures that can cascade throughout the engine. The high-pressure fuel pump is particularly troublesome, as its failure can distribute metal debris throughout the entire fuel system, leading to complete engine failure in severe cases.
The EGR cooler system represents another serious concern. When this component fails, it leaks coolant into the engine bay, creating not only performance issues but also a significant fire hazard that puts driver safety at risk.
Transmission and Electrical Problems
The 2014 model also exhibits significant transmission pairing issues. Many owners report abnormal shifting patterns and RPM fluctuations that manifest as rough shifting, unexpected gear changes, and poor overall performance.
Electrical system problems, particularly with the crankshaft position sensor, can cause unexpected stalling or failure to start – creating serious safety concerns for drivers. The frequency and severity of these issues make the 2014 model year one to avoid at all costs.
| Component | Common Issue | Typical Repair Cost | Average Mileage at Failure |
| High-Pressure Fuel Pump | Complete failure, metal contamination | $2,500-$4,000 | 60,000-80,000 |
| EGR Cooler | Cracking, coolant leaks | $1,200-$1,800 | 40,000-70,000 |
| Oil Cooler | Coolant mixing with engine oil | $1,500-$2,200 | 10,000-50,000 |
| Transmission | Abnormal shifting, RPM fluctuations | $3,000-$4,500 | 70,000-90,000 |
2015 Ram EcoDiesel: Continued Reliability Challenges
Carry-Over Issues and New Problems
The 2015 Ram EcoDiesel continued to face significant reliability challenges, carrying forward many problems from the previous year while introducing new concerns. The EGR cooler system remained particularly troublesome, with cracking issues that could lead to engine fires and costly repairs.
The turbocharger system in the 2015 model showed multiple failure points. Numerous cases of turbo underboost conditions and wastegate actuator failures severely impacted engine performance. Even after initial repairs, these issues often recurred, leading to ongoing maintenance headaches for owners.
Fuel and Electrical System Failures
The fuel system presented its own set of challenges. High-pressure fuel pump failures became increasingly common, contaminating the entire fuel system and requiring extensive repairs. The fuel crossover tube also proved problematic, necessitating replacement along with various seals and gaskets.
One particularly frustrating aspect of the 2015 model was its tendency to experience problems without triggering diagnostic codes. Many cases where the DEF gauge would show “full” continuously, traction control would fail, and engines would misfire – all without throwing any codes – made diagnosis extremely challenging, even for experienced technicians.
Improvements Over 2014
- Minor updates to transmission control module
- Slightly improved DEF system reliability
- Better integration with vehicle electronics
Persistent Problems
- Continued EGR cooler failures
- Turbocharger reliability issues
- Fuel system contamination
- Electrical system malfunctions
- 17 total recalls affecting various systems
2016 Ram EcoDiesel: Final Year to Avoid
The 2016 Ram EcoDiesel faced significant mechanical challenges, with engine failures being particularly concerning. The average repair cost for engine-related issues reached approximately $7,180, typically occurring around 78,900 miles. Many owners found themselves needing complete engine replacements, highlighting the severity of these problems.
The SCR catalyst system proved especially troublesome in the 2016 model. Numerous cases where this emissions control component failed led to reduced performance and expensive repairs. The system’s complexity made diagnostics difficult, often resulting in multiple repair attempts before resolving the issue.
Bottom End Mechanical Failures
Bottom end mechanical failures were another significant concern. Rod bearings and crankshaft issues emerged as common problems, often manifesting through unusual engine noises and decreased performance. These failures typically resulted in catastrophic engine damage when left unaddressed.
The cooling system continued to present challenges, with persistent oil cooler failures being particularly problematic. When towing heavy loads, these failures became more frequent, leading to coolant contamination and potential engine damage. The EGR system also remained troublesome, with cooler failures potentially causing coolant to leak into critical engine components.
Common Issues Across 2014-2016 Ram EcoDiesel Models
Emissions System Problems
The early Ram EcoDiesel models faced significant challenges with their emissions systems. The EPA-mandated recalls, particularly the V08 emissions recall, drastically affected vehicle performance. Many owners reported noticeable changes after the required software updates, including sluggish acceleration and louder engine noise, especially in lower gears.
A major ongoing concern has been the Z46 recall affecting the high-pressure fuel pump in 2014-2019 models. Despite the recall announcement, replacement parts remained unavailable for extended periods, leaving many owners in limbo. This situation created significant reliability concerns and frustrated many EcoDiesel owners who couldn’t get their vehicles properly repaired.
DEF System Failures
The DEF (Diesel Exhaust Fluid) system is a critical point of concern across multiple Ram EcoDiesel model years. The system is particularly sensitive to contamination, which can trigger the dreaded “Engine will not restart” warning. This issue often stems from improper DEF handling, especially when overfilling at truck stops, where spillage can contaminate the fuel system.
The DEF injectors are prone to crystallization, requiring regular maintenance to prevent clogging. Many cases where crystallized DEF leads to system failures, triggering various error codes and potentially leaving owners stranded. Regular cleaning of the DEF injector should be part of routine maintenance to avoid these issues.
“After the emissions update, my 2015 Ram EcoDiesel lost significant power and started experiencing hesitation during acceleration. What was once a responsive truck became sluggish and frustrating to drive.”
Essential Maintenance Tips for Ram EcoDiesel Owners
If you already own one of these problematic Ram EcoDiesel years, proper maintenance is crucial to mitigate potential issues. Following these maintenance guidelines can help extend the life of your vehicle and prevent some of the most common failures.
Fuel System Maintenance
- Use Quality Fuel: Always fill up at reputable stations to minimize contaminants.
- Replace Fuel Filters Regularly: Change filters every 15,000 miles instead of the recommended 20,000 miles.
- Add Fuel Additives: Use diesel-specific additives to keep injectors clean and prevent bacterial growth in the fuel system.
- Drain Water Separator: Regularly check and drain the water separator to prevent fuel contamination.
EGR and Cooling System Care
- Monitor Coolant Levels: Check coolant levels weekly and look for signs of leaks or contamination.
- Inspect EGR Cooler: Have the EGR cooler inspected every 20,000 miles for signs of cracking or failure.
- Clean EGR System: Consider professional EGR system cleaning every 30,000 miles to prevent carbon buildup.
- Use Proper Coolant: Only use manufacturer-recommended coolant to prevent corrosion and system damage.
DEF System Maintenance
The DEF system requires special attention to prevent the common failures seen in these model years:
| Maintenance Task | Frequency | Importance | Notes |
| Use Quality DEF Fluid | Every fill-up | Critical | Only use API-certified DEF fluid |
| Clean DEF Tank Cap | Every fill-up | High | Prevents contamination during filling |
| Inspect DEF Lines | Every 10,000 miles | Medium | Check for crystallization or leaks |
| Clean DEF Injector | Every 30,000 miles | High | Prevents system failure |
Warning: Never ignore DEF system warnings or attempt to bypass the system. Doing so can cause severe engine damage and may violate federal emissions regulations. Always address DEF system issues promptly with a qualified technician.
Most Reliable Ram EcoDiesel Years to Consider
If you’re in the market for a Ram EcoDiesel, several model years offer significantly better reliability than the problematic 2014-2016 versions. These improved models benefit from engineering updates and design refinements that addressed many of the early issues.
2017 and Newer: Significant Improvements
The 2017 model year marked a turning point for the Ram EcoDiesel, with substantial improvements to the engine and emissions systems. The manufacturer addressed many of the problems that plagued earlier models, resulting in a more reliable vehicle overall.
2017-2018 Ram EcoDiesel
The 2017-2018 models feature improved EGR cooling systems and updated fuel system components. These years show significantly fewer reports of catastrophic failures compared to earlier models.
- Enhanced 8-speed automatic transmission
- Improved EGR cooler design
- Better fuel system reliability
- Reduced emissions system issues
2019-2020 Ram EcoDiesel
The 2019-2020 models represent further refinement of the EcoDiesel platform. These years feature the third-generation EcoDiesel engine with improved power and torque while maintaining excellent fuel economy.
- Third-generation 3.0L V6 EcoDiesel
- Increased torque (480 lb-ft)
- Improved towing capacity (12,560 lbs)
- Enhanced DEF system reliability
2021-2022 Ram EcoDiesel
The 2021-2022 models represent the most refined version of the Ram EcoDiesel before production ended. These years offer the best combination of reliability, performance, and technology.
- Most reliable EcoDiesel generation
- Excellent fuel economy (32 mpg highway)
- Advanced driver assistance features
- Improved emissions system durability
Note: Ram discontinued the EcoDiesel engine in January 2023 as the company shifts focus toward electrification. This has increased demand for well-maintained used models from the reliable years (2017-2022).
Legal Issues and Recalls for Ram EcoDiesel
The Ram EcoDiesel has been subject to several significant legal issues and recalls, particularly affecting the problematic 2014-2016 model years. Understanding these legal matters can help owners navigate potential warranty claims and legal rights.
Class Action Lawsuits and Settlements
In 2020, a class action lawsuit was filed against Fiat Chrysler Automobiles (FCA) regarding defective EGR coolers in Ram 1500 and 1500 Classic trucks equipped with the 3.0L EcoDiesel engine. The lawsuit claimed that the defective EGR cooler could crack and leak coolant, potentially causing engine fires.
FCA also settled with federal, consumer, and state regulators regarding emissions issues in 2014-2016 Ram 1500 and Jeep Grand Cherokee vehicles equipped with 3.0L EcoDiesel engines. This settlement required the company to implement approved emissions modifications and extended warranties for affected vehicles.
Major Recalls Affecting Ram EcoDiesel
| Recall Number | Affected Years | Issue | Resolution |
| V08 | 2014-2016 | Emissions system non-compliance | Software update and extended warranty |
| Z46 | 2014-2019 | High-pressure fuel pump failure | Pump replacement (parts often unavailable) |
| U03 | 2014-2015 | Exhaust gas recirculation cooler cracking | EGR cooler replacement |
| W80 | 2014-2016 | Exhaust coupler leaking | Redesigned coupler installation |
If you own a Ram EcoDiesel from these problematic years, check whether your vehicle has had all applicable recalls performed. You can verify this by entering your VIN on the NHTSA recall website or contacting your local Ram dealership.
Making an Informed Decision About Ram EcoDiesel
The Ram EcoDiesel offers impressive fuel economy and towing capability when functioning properly, but the 2014-2016 model years present significant reliability concerns that potential buyers should carefully consider. These early models suffer from numerous mechanical issues that can lead to expensive repairs and frustrating ownership experiences.
If you’re in the market for a Ram EcoDiesel, focus on 2017 and newer models, which show substantial improvements in reliability and performance. These later years benefit from engineering updates that addressed many of the problems plaguing the earlier versions.
For current owners of 2014-2016 models, following the maintenance recommendations outlined in this article can help mitigate some risks, but be prepared for potential repairs as these vehicles age. Always ensure all recalls have been performed and consider extended warranty coverage if available.
Need Help With Your Ram EcoDiesel?
If you own a problematic Ram EcoDiesel or are considering purchasing one, our certified diesel technicians can provide a comprehensive pre-purchase inspection or diagnostic service to identify potential issues before they become costly repairs.
Frequently Asked Questions About Ram EcoDiesel
How long do Ram EcoDiesel engines typically last?
With proper maintenance, a Ram EcoDiesel from the reliable model years (2017 and newer) can last between 200,000 and 300,000 miles. However, the problematic 2014-2016 models often experience major issues before reaching 100,000 miles, with some requiring engine replacement as early as 80,000 miles.
What is the towing capacity of the Ram EcoDiesel?
The towing capacity varies by model year. The 2014-2016 models offer around 9,200 pounds of towing capacity. The improved 2019-2022 models feature increased capacity of up to 12,560 pounds when properly equipped, making them more capable for heavy towing applications.
Why did Ram discontinue the EcoDiesel engine?
Ram discontinued the EcoDiesel engine in January 2023 as part of the company’s shift toward electrification. Former Ram brand CEO Mike Koval Jr. stated that Ram is focusing on developing electric vehicles, with plans to launch a battery-electric Ram 1500 RamCharger in 2025.
Are there any warning signs that indicate potential EcoDiesel problems?
Yes, several warning signs may indicate developing issues with a Ram EcoDiesel:
- White smoke from the exhaust (potential glow plug or injector issues)
- Coolant loss without visible leaks (possible EGR cooler failure)
- Engine hesitation or power loss (potential fuel system issues)
- Unusual engine noises, particularly knocking sounds (possible bottom end failure)
- DEF system warnings or frequent regeneration cycles (emissions system problems)
If you notice any of these symptoms, have your vehicle inspected by a qualified diesel technician immediately to prevent more serious damage.
