2012 RAM 2500 fuel/propulsion system problems
This is a safety-related system. If you notice symptoms, stop driving and have it inspected.
What owners report
“My passenger headlights keeps going in and out. The wiring harness has been replaced twice and it still does it. My check engine light keeps coming on for the evap system even though its been replaced.”
NHTSA complaint · filed 01/04/2026
“Our 2012 RAM 2500 truck with 135k miles, had it's fuel tank fail. The dealership in Oak Ridge, TN tested the vehicle and found that the gas tank tubes were broken causing us to not be able to fill the tank. The dealership recommended "NEED TO REPLACE GAS TANK". Mopar aka Stellantis does not make the fuel tank anymore, the "replacement" fuel tank does not work (completely wrong configuration), there is not an aftermarket tank. We have a Million Mile bumper to bumper warranty with MOPAR. "Cus…”
NHTSA complaint · filed 11/06/2025
“EXCESSIVE FUEL CONSUMPTION..LESS THAN 10MPG, HIGH OPERATING TEMPERATURE, POWER/PERFORMANCE WITH/ WITHOUT. MODERATE TOWING LOADS. HIGH TEMPERATURES ASSOCIATED WITH ELEVATIONS IN EXCESS OF 4OOO FEET. FREQUENT ENGINE LIGHT APPEARANCE.”
NHTSA complaint · filed 09/20/2017
“TL* THE CONTACT OWNS A 2012 RAM 2500. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 14V635000 (ENGINE AND ENGINE COOLING, FUEL SYSTEM, DIESEL) HOWEVER, THE PART TO DO THE REPAIR WAS UNAVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE CONTACT HAD NOT EXPERIENCED A FAILURE. PARTS DISTRIBUTION DISCONNECT.”
NHTSA complaint · filed 12/18/2015
“TL* THE CONTACT OWNS A 2012 DODGE RAM 2500. WHILE ATTEMPTING TO REFUEL THE VEHICLE, THE FILLER NECK REJECTED FUEL. THE CONTACT MENTIONED THAT THE VEHICLE WOULD NOT ALLOW THE PUMP TO REFUEL AND WOULD RESPOND AS IF THERE WERE A FULL TANK WHEN THE VEHICLE WAS LOW ON FUEL. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 7,771. THE VIN WAS NOT AVAILABLE.”
NHTSA complaint · filed 10/29/2015
“PRIOR TO EPA EMISSIONS RECALL I WOULD ACHIEVE DIESEL FUEL EFFICIENCIES AS HIGH AS 21 MPG HIGHWAY, PULLING A 18 FOOT TRAILER AT A 1 HOUR DURATION. THE CITY MPG AVERAGED TO 13-15 MPG, SINCE THE EMISSIONS RECALL UPDATE MADE ON THIS VEHICLE, MPG HAS AVERAGED BETWEEN 10-13 MPG ON HIGHWAY WITH NO LOAD/NO TRAILER AND AVERAGES BETWEEN 9-11 MPG IN CITY. THESE BENCHMARKS HAVE BEEN CONSISTENTLY COMPARED AND ROAD CONDITIONS HAVE BEEN SAME. TO ADD TO THIS ISSUE, THERE HAS BEEN A LOSS OF POWER THAT HAS CA…”
NHTSA complaint · filed 10/27/2015
“TL* THE CONTACT OWNS A 2012 DODGE RAM 2500. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 14V635000 (ENGINE AND ENGINE COOLING, FUEL SYSTEM, DIESEL); HOWEVER, THE PART NEEDED TO PERFORM THE REPAIR WAS UNAVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE MANUFACTURER WAS NOTIFIED OF THE ISSUE. THE CONTACT HAD NOT EXPERIENCED A FAILURE.”
NHTSA complaint · filed 09/25/2015
“WHEN ACCELARATING, FROM A STOP ESPECIALLY, THE THROTTLE INTERMITANTLY WILL GIVE AN ALMOST DEAD RESPONSE. IT CAN BE PRESSED ALL OF THE WAY DOWN TO WIDE OPEN AND IT SLOWELY DEVELOPES POWER AND DOES NOT REACH FULL POWER UNTILL AFTER THE 1, 2 SHIFT. IT IS DANGEROUS AND IS GOING TO CAUSE AN ACCIDENT. NO MIL LIGHT NOR TROIBLE CODES ARE PRESENT.”
NHTSA complaint · filed 08/09/2015
Unverified owner reports from NHTSA's public complaint database.
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- How common are 2012 RAM 2500 fuel/propulsion system problems?
- 24 owners reported fuel/propulsion system issues to NHTSA for the 2012 RAM 2500 and 1 a fire. Counts scale with how many were sold.
- Is there a recall for 2012 RAM 2500 fuel/propulsion system problems?
- No matching recall is on file. Check your VIN at nhtsa.gov/recalls for the latest.