Ram Promaster check engine light comes on

Filed Oct 7, 2026 · Fuel system · FL

What component or system failed or malfunctioned, and is it available for inspection upon request? The plastic fuel tank failed. It cracked/split open and is actively leaking gasoline. The failure is at or near the filler inlet connection where the filler pipe attaches to the tank. The tank is still installed on the vehicle and is available for inspection upon request at Lakeland Chrysler Dodge Jeep Ram (or can be made available wherever the vehicle is located). How was your safety or the safety of others put at risk? Gasoline is leaking from the tank onto the ground. This creates a serious fire and explosion hazard, especially near the exhaust system. The vehicle cannot be safely driven and was immediately taken out of service. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The vehicle was inspected and diagnosed by Lakeland Chrysler Dodge Jeep Ram on or about October 6, 2026. They confirmed the fuel tank is cracked and leaking and issued a written estimate for complete fuel tank replacement (parts and labor approximately $2,525 for the tank alone). The replacement tank is currently on backorder with an estimated two-week wait. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has been inspected and diagnosed by the Ram dealer (Lakeland Chrysler Dodge Jeep Ram). It has not yet been inspected by the manufacturer, police, or insurance representatives. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Yes. There were no warning lamps, dashboard messages or check-engine lights. We started smelling gas and it was leaving a puddle when parked. There was enough on the ground to catch fire

Filed Jul 30, 2026 · Engine · NC

The check-engine light came on my 2nd day of ownership (less than 100 miles driven by me, but 2032 miles on it when purchased new - RV conversion from Entegra Coach through LaMesa RV), on October 5, 2025. After diagnosis at a Ram dealership (Larry Miller Dodge Ram in Tucson AZ), they identified the code was misfire on cylinder 6, which caused low compression, with a root cause of the intake valves being improperly seated during manufacturing. The dealership replaced some cylinder and engine parts, but the issue recurred on Cylinder 4 after driving it about 5000+ miles, on June 13, 2026. Again, misfire check-engine code and loss of compression on cylinder 4. The engine ran very rough and had loss of power. The engine is still under investigation by another Ram dealership service department (Crest Auto World, Center Conway, NH). I have learned that loss of compression can cause the engine to stall, lose acceleration power (which it did), and potentially throw a rod and blow a hole in the engine. Since this was caused by a manufacturing defect, I am also concerned that there are other vans with this issue on the road.

Filed Jun 15, 2026 · Engine, Steering · 33,000 miles · UT

The contact owns a 2023 Ram Promaster 2500. The contact stated that while driving at various speeds, the vehicle lost power steering assist with several unknown warning lights, and the check engine and parking assist warning lights were illuminated. The contact was forced to restart the vehicle to resume normal operation. The vehicle was initially taken to the dealer where the wiring harness was replaced; however, the failure returned soon after the repair. The vehicle was taken back to the dealer where several parts including the steering sensor and steering column were replaced; however, the failure returned weeks later after the repair. The manufacturer was notified of the failure. The vehicle was not repaired and remained with the dealer. The failure mileage was approximately 33,000.

Filed May 7, 2026 · Acceleration, Transmission · TX

12/2020 First the TPS sensor failed at 1,000 miles and almost caused an accident. Would not go over 25mph, was shifting hard, and the service engine light was on. Verified and replaced at dealership. Second, the rear view camera stopped working while backing up and almost caused an accident - no back windows - major safety issue. Replaced by me as they have no replacement for it even though its under recall. No warnings. Third, the transmission was shifting hard and fell out while I was driving on the freeway at 55,000. Damaged transmission and crankshaft and joints. Verified and replaced at dealership. No warnings, no lights Fourth, the transmission bolt was found loose, hard shifts, and has an internal breakdown at 71,000 miles. Verified first by independent shop - they tightened the bolt for me and is now sitting at the dealership waiting on another transmission that has been verified and approved under warranty. No warnings, no lights

Filed Mar 12, 2026 · Transmission · 108,000 miles · NJ

The contact owns a 2015 Ram Promaster 2500. The contact stated that, while driving at an undisclosed speed, the check engine warning light illuminated, indicating a torque converter failure. The vehicle was taken to an independent mechanic, where the torque converter was replaced. The failure recurred and was repaired an additional two times. During the final repair, the mechanic determined that fluid was leaking from the radiator into the transmission. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 108,000.

Filed Feb 5, 2026 · Driver assistance, Engine · 69,580 miles · FL

The contact owns a 2020 Ram Promaster 1500. The contact stated that while his wife was driving at an undisclosed speed, the vehicle jerked, and the transmission downshifted unexpectedly. The check engine warning light illuminated. In addition, while shifted in reverse(R), the vehicle failed to function as intended. The vehicle was taken to the dealer, where it was diagnosed with transmission failure. The contact was informed that parts were not available to repair the vehicle. The vehicle remained at the dealer for over a year and a half. The vehicle was repaired. The contact stated that on the day the contact was supposed to pick up the vehicle, the contact noticed oil stains on the ground. The contact stated that an abnormal sound was coming from the steering wheel when the gear lever was in reverse(R). The steering wheel failed to function as intended; when the steering wheel was moved, the steering wheel remained frozen in position, and force was used to turn the steering wheel. The maintenance record showed that service was performed. However, when the contact checked the oil, the oil was black, and there was a rotten odor coming from the oil and the vehicle remained at the dealer. The contact later received notifications of the federal safety agency Campaign Numbers: 25V552000 (BACK OVER PREVENTION) and 25V720000 (ENGINE AND ENGINE COOLING). The contact stated that when the heater was activated, heat was coming from the vents on the passenger side, and heat failed to come from the driver’s side. The contact was informed that the vehicle was repaired. The vehicle was retrieved, and days later the transmission failed to function as needed. The dealer was contacted; however, the contact was informed that the transmission had been repaired and no more repairs were needed. The manufacturer was made aware of the failure and the contact was informed that a field inspector would be sent to inspect the vehicle at the residence. The contact stated that days later the manufacturer sent a letter that the case was closed. The failure milea

Filed Feb 4, 2026 · Engine · 150,000 miles · NY

The contact's boyfriend owns a 2015 Ram Promaster 2500. The contact stated that while her boyfriend was driving at an undisclosed speed, the check engine warning light illuminated. The driver continued driving, and the vehicle entered LIMP Mode and failed to accelerate above 5 MPH. The vehicle was taken to a dealer where it was serviced under an unknown recall; however, soon after the vehicle was repaired, the failure returned. The vehicle was taken back to the dealer and serviced a second time under the same recall. Recently, the contact stated the failure returned, and the vehicle was taken back to the dealer. The vehicle remained with the dealer for several months before the contact was informed that the vehicle could not be serviced. The contact was advised to retrieve the vehicle. The manufacturer was notified of the failure, and the contact was provided with the same information as the dealer. The vehicle was not repaired. The failure mileage was approximately 150,000.

Filed Dec 19, 2025 · Brakes, Fuel system · 60,000 miles · MI

The contact owns a 2015 Ram ProMaster 2500. The contact stated that the same day that the vehicle was purchased, the check engine warning light illuminated. The contact stated that after shifting to park(P) and the parking brake was engaged, the vehicle rolled backwards. The vehicle was taken to the dealer, who diagnosed the vehicle with an unknown sensor failure. The sensor and the brakes were repaired. The contact retrieved the vehicle, and the check engine warning light was illuminated. When the gear lever was shifted to park(P) and the parking brake was engaged, the vehicle rolled backwards. The dealer was contacted, and the dealer at first refused to take the vehicle. After several months, the dealer took the vehicle, and it was diagnosed and determined that the fuel injectors, brakes, fuel tank, and an unknown sensor needed to be replaced. The vehicle was not repaired due to the cost. The contact stated that the failure persisted. The vehicle was parked at the residence and had not been driven since. The manufacturer was not notified of the failure. The failure mileage was approximately 60,000.

Filed Dec 17, 2025 · Electrical, Steering · OH

Less than a half mile into my work day the van started flashing all warning lights ( Hill assist, power steering, service engine, abs ETC.) I was on a busy road and was attempting to pull off to safety But the van turned off. Was able to jump it after 2 attempts and get it to the dealer 1 mile away, without any other lights coming back on aside from CEL. Dealer informed me I have 2 Corroded wiring harnesses, bad rack & Pinion and alternator is at 7%.... From what I've heard, this is a problem that could have been prevented by the manufacturers.. I also had a Transmission replacement at 30k miles and full Engine replacement at 55k miles. Currently at 80k Miles... This is Unacceptable for a Commercial fleet vehicle.

Filed Nov 6, 2025 · Engine · NC

Check engine light came on the 2nd day I owned it. The van was converted to an Entegra Ethos Class B RV by Entegra/Jayco, and had over 2000 miles in it when I bought it (New 2026) from La Mesa RV in Tucson AZ on Oct 4, 2025, after they transferred it from the Phoenix La Mesa RV location. After checking the engine light code with an Auto Parts store, it was shown to be an issue with the 6th cylinder. After getting the runaround from 2 Dodge dealers (system down, too busy, no certified tech), I took it to a privately owned garage who diagnosed low compression in the 6th cylinder. They were concerned for my safety to drive it. With this testing info written by the private garage, I got the Dodge dealer in Tucson to take it in and start the diagnosis process. It is an engine defect from initial manufacturing of the engine. Still trying to work through the repair process and the van is still with the dealer. They are trying the easiest and cheapest parts in succession to try to get it passing. This is a safety hazard and will likely cause long term problems, per friends with automotive experience. I'm assuming this van isn't the only one with this issue right off the manufacturing line.