Multiple Misfire Codes on the 2025 Ram 1500

The Ram 1500 has been celebrated for its robust design, advanced features, and powerful performance. However, some owners, particularly of the 2025 model, have encountered an issue that significantly disrupts their experience: multiple misfire codes. This article dives deep into the problem, examining its causes, implications, and possible solutions while incorporating real-world accounts from vehicle owners.

What Are Multiple Misfire Codes?

Multiple misfire codes, commonly identified by the diagnostic trouble codes (DTCs) P0300 and P0301, signal that the engine is experiencing combustion irregularities. These misfires occur when the air-fuel mixture in the engine’s cylinders fails to ignite properly, disrupting engine performance. The symptoms can range from rough idling and reduced power to increased fuel consumption and, in severe cases, stalling.

Common Causes of Misfire Codes

1. Ignition System Problems
   • Faulty spark plugs, ignition coils, or damaged wiring can prevent efficient ignition of the air-fuel mixture, leading to misfires.
   • Over time, spark plugs wear out, and coils may fail, particularly if subjected to extreme temperatures.
2. Fuel System Issues
   • Clogged fuel injectors or insufficient fuel pressure can disturb the balance of air and fuel entering the cylinders.
   • Debris or contaminants in the fuel system often contribute to these issues.
3. Vacuum Leaks
   • Leaks in vacuum lines or gaskets can disrupt the engine’s air-fuel ratio.
   • This imbalance leads to inefficient combustion and triggers misfire codes.
4. Mechanical Problems
   • Worn camshaft lobes, faulty lifters, or low cylinder compression are significant mechanical contributors.
   • These issues indicate internal engine wear and can be costly to repair.
5. Sensor Failures
   • Malfunctioning oxygen sensors or crankshaft position sensors impact engine timing and fuel delivery.
   • These sensors are critical for maintaining proper combustion and overall engine health.

Reports from 2025 Ram 1500 Owners

The 2025 Ram 1500 has seen a surge in complaints about misfire codes, with several cases highlighting persistent issues:

• Misfires and Rough Idle: A Cedar Falls owner reported unresolved misfire codes and rough idling at just 2,200 miles. Despite multiple dealer visits, the issue persisted.
• Engine Stalling: In Coral Springs, a new truck stalled repeatedly on the road at 702 miles. Restarting the engine proved difficult, and the truck required towing and subsequent repairs.
• Recurrent Breakdowns: Another Coral Springs owner faced a breakdown at 749 miles after the truck was reprogrammed at the dealership. The engine failed to restart, necessitating another tow.

Dealer Responses and Challenges

Many dealers attribute these problems to software-related issues, particularly in vehicles equipped with the eTorque system. Temporary software updates have been released—notably on October 8 and November 1, 2024—but these fixes have not resolved the problems for all vehicles. In some cases, dealers escalate unresolved issues through a “STAR case,” forwarding the problem to Stellantis engineers for further investigation.

Impacts on Owners

1. Frustration and Inconvenience
   • Owners frequently travel long distances to dealerships, only to face delays and ambiguous responses.
   • A Minnesota owner expressed frustration over the disabled remote start feature, critical for defrosting and preheating the vehicle in winter.
2. Unmet Expectations
   • Many buyers expect a trouble-free experience with a new vehicle. Persistent issues and the lack of immediate resolutions undermine confidence in the Ram 1500.
3. Potential Safety Concerns
   • Stalling engines on busy roads pose serious safety risks, especially in high-traffic or hazardous conditions.

Recommended Actions for Owners

1. Diagnostic Scanning
   • Use an OBD-II scanner to identify specific misfire codes, such as P0300 or P0301. These tools can provide detailed insights into the root cause.
2. Inspect and Replace Key Components
   • Spark Plugs and Coils: Check for wear or damage and replace as necessary.
   • Fuel Injectors: Clean or replace injectors to ensure proper fuel delivery.
   • Vacuum Lines: Inspect for leaks or disconnections.
   • Sensors: Test oxygen and crankshaft position sensors for proper operation.
3. Apply Software Updates
   • Ensure that your dealership has installed the latest software updates released by Stellantis.
4. Seek Professional Evaluation
   • If the problem persists, consult a qualified mechanic or dealership for an in-depth diagnosis and potential repairs.
5. Consider Lemon Law Options
   • If the issue remains unresolved, investigate Lemon Law protections in your state. These laws may allow you to return or replace the vehicle.

Insights from Stellantis Engineers

In some cases, misfires have been linked to:

• Disconnected Air Hoses: During routine maintenance, air hoses near the air filter may be dislodged, causing misfires.
• New Sensors in Hurricane Engines: The introduction of advanced sensors in newer engines, while improving efficiency, has occasionally resulted in operational errors.

Preventive Measures

1. Regular Maintenance
   • Follow the manufacturer’s recommended service intervals for spark plugs, fuel injectors, and filters.
   • Keep the engine’s air intake and fuel systems clean to prevent blockages.
2. Monitor Software Updates
   • Stay informed about any new bulletins or updates from Stellantis that address misfire issues.
3. Prompt Repairs
   • Address engine performance issues as soon as they arise to prevent long-term damage.

User Comments on the 2025 RAM Misfire Code (P0300)

Mentzie

“Receive the truck back in the morning with a reprogramming drove about 40 miles locally and the same thing happened stuck in the middle of the road truck would not restart towed in the dealer New Year’s Eve, so no nobody there to check waiting for the next issue and the truck for three weeks 740 total miles right now.”

Mentzie shared their frustration with recurring issues despite the dealer’s attempt to fix the problem through reprogramming. After only 40 miles of driving post-repair, the truck stalled in the middle of the road and wouldn’t restart. The vehicle had to be towed, leaving them stranded during the holidays, and has since been at the dealership for three weeks without resolution.

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Mentzie

“New truck 700 miles engine stalls on road lose all power roll to side. Try to restart took 20 minutes to restart drive 20 feet more engine stalls again engine light lights was able to get a parking lot and toad trip number one repaired next day I’ll put another complaint about D2.”

Mentzie reported another issue where their 2025 RAM Big Horn, with only 700 miles, stalled on the road, completely losing power. Restarting the vehicle took 20 minutes, but it stalled again after only 20 feet. The truck finally had to be towed for repairs. This highlights the reliability concerns with the P0300 misfire code.

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Kevin R

“1500 Bighorn Crew Cab 4×4 3.6L Etorque: Automatic transmission, 2,200 miles – Multiple misfire codes, 4 times and Dealer can’t fix misfire and rough idle.”

Kevin R. experienced repeated misfire issues and rough idling with their RAM Big Horn 3.6L Etorque engine. Despite having only 2,200 miles on the vehicle, the misfire code appeared four times. The dealer has been unable to resolve the issue, demonstrating the ongoing challenges for affected customers.

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Joe86

“I know this question was directed to Anthony, but I’ve been monitoring this issue on a daily basis. Here is what I gathered so far from 5th gen and FB. Till today, there is not a real fix from RAM. They keep saying RAM is working on a software update, but nothing is out yet. No one knows what is triggering this misfire. Dealerships are replacing different parts, but no luck. Some owners are on their 3rd misfire. Not all 2025 RAMs are experiencing this. All these misfires are reported from the SO engine, nothing from the HO. Apparently RAM took few trucks back to headquarters to figure out what’s wrong with it.”

Joe86 provided an overview of the situation, highlighting that RAM has yet to release a definitive fix for the misfire issue. He noted that dealerships have been unable to pinpoint the cause, often replacing parts unsuccessfully. Some owners have faced multiple occurrences of the misfire problem. According to his observations, the issue seems isolated to SO engines, as HO engines are unaffected. RAM has even taken some vehicles back to headquarters for further investigation.

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These user experiences underline the widespread frustration and challenges associated with the P0300 misfire code in the 2025 RAM Big Horn, emphasizing unresolved technical issues and the impact on customers’ confidence.

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The 2025 Ram 1500’s multiple misfire codes highlight a combination of mechanical, electrical, and software-related challenges. While Stellantis continues to work on comprehensive fixes, owners are encouraged to take proactive measures by maintaining their vehicles, applying software updates, and seeking professional assistance when necessary. Addressing these issues promptly is crucial not only for the performance and reliability of the Ram 1500 but also for the safety and satisfaction of its owners. By staying informed and vigilant, owners can navigate these challenges and ensure their vehicles operate at their best.

The video below talks about the error codes that are possible in Ram 1500: