2012 Dodge RAM 3500: check engine light

Filed Apr 30, 2026 · Engine, Fuel system · AK

Driving my 2012 dodge ram 3500, just as I was crossing one of the busiest intersections in my town my truck lost all power and dropped from 35mph to 5 mph. Barley made it acrossed and pulled over. As soon as I pulled over the engine light comes on, checked code, and U010C lost coms with turbo actuator comes up. Turned truck off and rest code and everything back to normal. About a week later it happened again, luckily not as busy of a spot. Called dealer and soonest appointment was in April. Meanwhile I look up code and see hundreds of post for same issue, bad actuator replace. 28 years as a diesel mechanic for the military, so I found the part online and ordered. Replaced the actuator, drove about 50 miles, light comes back on. Finally get my appointment with dealer and they say my turbo is bad, they want $8k to fix. I ordered the turbo and replaced it myself along with another actuator, test drove. Light still comes on but have not lost power yet?? Dealer is not helping. This is a major issue that is all over the internet! The truck just goes to limp and your in the middle of traffic. If this has not caused an accident it’s only a matter of time before it does. The dealer ship just wants to replace big parts for lots of money. I’m already $2500 into this and still having an issue

Filed Feb 14, 2025 · Suspension, Transmission · 215,000 miles · TN

The contact owns a 2012 Ram 3500. The contact stated that while driving uphill at 55 MPH, the contact became aware that the vehicle was not exceeding 55 MPH. The contact stated that the check engine warning light was illuminated. The contact continued driving to the destination. The vehicle was parked; however, upon inspection, the contact became aware that there were damages on top of the front driver’s side ball joint, the rear driver’s side axle leaf spring shackle, and the driver’s side overload spring. Additionally, there were metal fragments found in the engine oil, and a diagnostic scan retrieved DTC: P0087, P0471, U029D. The vehicle was taken to a local dealer where it was inspected; however, the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 215,000.

Filed Dec 30, 2019 · Electrical, Transmission · 141,000 miles · UT

While driving check engine light came on, took it to the mechanic shows multiple fault codes. Mechanic and dealer cannot find cause of codes. Replaced every sensor and computer 2 times still has the same codes.

Filed Aug 9, 2017 · Engine, Transmission · OK

Scr catalyst system, engine light on for it, every other rtuck with this system has been recalled already

Filed Jun 10, 2015 · Transmission · 31,000 miles · WA

While driving truck, throttle light starts flashing, engine light comes on and lightening bolt comes up. Car then loses all power and it dies. No notice. Very scary. Could cause serious or fatality accident since there is no notice and it just goes from 60 - 0. Dealer has had the truck in half a dozen times and still cannot fix the issue. Chrysler has given me case manager, but they cannot figure it out either. They have tried a few different things, but it is not fixing the issue. Now dealer says they dont know what it is and they do not know how to fix it.

Filed Jul 22, 2014 · Engine, Steering · FL

2012 dodge ram 3500. Consumer writes in regards to front end tie rod recall part issues. *smd the consumer stated he received the recall notice in december 2013. The dealer informed him, the parts were on back order. As of july 2014, the problem was still not resolved. *jb the consumer stated there was a problem with the emission system and the check engine light illuminated. The problem was diagnosed as an o2 sensor issue. The sensor would be replaced, and 1-2 days later the check engine light would illuminate again. The o2 sensor was replaced several times. Sometime, twice in one month. Updated 10/01/14.

Filed Apr 10, 2014 · Fuel system · 156,894 miles · IN

Tl* the contact owns a 2012 dodge ram 3500. The contact stated that while hauling a trailer at 60 MPH, the check engine warning light illuminated as the vehicle lost acceleration power. The vehicle was taken to the dealer several times for the failure where the dealer replaced the pressure relief valve, the fuel filter twice, the fuel pump was replaced three times, the fuel canister housing was replaced four times, and the software was updated but the failure was not corrected. The manufacturer was made aware of the failure. The failure mileage was 156,894 and the current mileage was 177,000.

Filed Mar 18, 2014 · Electrical, Steering · 8,000 miles · TX

In august 2012 the engine warning light came on. It was taken to dodge dealer numerous times for repair. They would reset saying chrysler would not allow repairs. In october the dodge dealer kept the vehicle until a week or so before christmas 2012. The engine warning light has stayed off. However within a few days of the vehicles return, I received a recall notice regarding the left tie rod ball stud....which could cause crash without warning. I immediately called the dodge dealer. He said chrysler was not supplying the repair parts. He put me on a list. I have called the dealer many times and he says I am at the top of the list for repairs but chrysler is only shipping one or two parts for the repairs per month.

Filed Dec 7, 2013 · Engine, Fuel system · 12,000 miles · AR

I pull a light weight 40' gooseneck trailer, and while driving I noticed the fuel mileage dropped tremendously and the coolant temp stayed around 220deg and I noticed a horrible loss of power which would not let me drive any faster than around 40-45mph! I took it to the dealership and they performed a boost test on the turbo and said that it's supposed to produce 32 pounds of boost but mine was only producing 26 pounds of boost, and then I was informed they could not justify replacing the turbo because it has not thrown a code on the instrument panel, well if you tell me it's supposed to produce one number and it's doing another then I believe that's enough justification to replace the part beings I paid $50,000 for a brand new truck! The loss of power causes traffic back-ups even if I'm in the slow lane! The temp out of the exhaust reaches 800deg's and melts my mudflap and has caused it to start smoldering after I come to a complete stop! I was later informed about the "re-gen" process and was told it would kick in and out of "re-gen" but I don't believe mine has came out of re-gen beings I'm still getting 5mph with or without a trailer! The engine light and ABS light comes on numerous times a day an then go off and now the engine light stays on all the time! This is a brand new dodge 3500 6.7l turbo diesel 4x4.