2021 Ram 1500 fuel system problems

Filed Nov 4, 2026 · Fuel system · 75,000 miles · OR

The contact owns a 2021 Ram 1500. The contact stated that while driving at 30 MPH, the vehicle lost motive power. The vehicle was towed to an independent mechanic, who determined that the diesel pump needed to be replaced. The manufacturer was notified of the failure by phone. The failure mileage was approximately 75,000.

Filed Oct 29, 2026 · Electrical, Fuel system · MD

A check engine light issue fuel filler neck replace, eism leak detection pump and fuel line bundle

Filed Oct 5, 2026 · Fuel system · CA

My 2021 Ram 1500 EcoDiesel previously had the federal high-pressure fuel pump safety recall completed (Recall Z96 / the federal safety agency Campaign 22V767000) on February 12, 2024, where remedy part CSSMZ461-AA was installed. Recently, the vehicle suffered a complete loss of motive power due to a sudden, catastrophic internal failure of this replacement fuel pump. The dealership service department has officially diagnosed the truck and confirmed that the replacement fuel pump blew up internally, sending metal shards throughout the entire fuel system and requiring a complete $9,080 replacement of the fuel loop. This is a complete failure of a federal safety recall remedy, duplicating the exact highway stalling hazard the recall was issued to fix. Stellantis/FCA must investigate why these replacement remedy pumps are continuing to fail and creating dangerous conditions for drivers.

Filed Aug 31, 2026 · Engine, Fuel system · CA

This vehicle was subject to the federal safety agency Recall 22V‑767 / Stellantis Recall Z96 for a defective Bosch CP4.2 high-pressure fuel pump (HPFP) known to fail and release metal debris into the fuel system. The recall remedy (HPFP replacement) was performed at an authorized Stellantis/Ram dealership on 3/29/2024. On 8/9/2026, while driving the vehicle suddenly lost engine power and blocked the road in the left lane. The vehicle failed to restart and needed to be towed. The vehicle was independently inspected at Saddleback Automotive Service Center, Santa Ana, CA (RO# 130026). The technician documented diagnostic trouble codes P0087 (fuel pressure governor deviation, low pressure), P025C (fuel pump module control circuit low), and P016F (closed-loop fuel pressure control at limit, pressure too low) — all consistent with the same CP4.2 HPFP failure mode the recall was intended to remedy. Photographic and video documentation confirms metallic contamination in the engine oil and fuel filter screen. This failure occurred more than two years after the recall repair, and Stellantis (Case #97888077) has denied consequential-damage coverage citing the standard 24-month Mopar parts warranty on the replaced pump. I am filing this complaint because the recall remedy performed in March 2024 appears to have been inadequate: the vehicle experienced a recurrence of the same fault codes associated with the recalled component, and the resulting metal contamination caused catastrophic engine damage. I believe this indicates the recall remedy did not fully address the underlying defect and that other vehicles that received the same recall remedy may be at risk of the same outcome. I am requesting that the federal safety agency investigate whether the 22V‑767/Z96 recall remedy is adequately preventing this failure mode in vehicles that received the HPFP replacement, and that this complaint be associated with any existing investigation into recurring CP4.2-related failures post-remedy.

Filed Jul 28, 2026 · Electrical, Engine · CA

Recently this vehicle has triggered a check engine light. Upon further examination the code was related to an ignition #3. (CODES: P020C, PO1DO).

Filed Jun 2, 2026 · Fuel system · CA

My 2021 RAM 1500 ecodiesel was subject to an the federal safety agency recall (23V‑263). The recall included a replacement High pressure fuel pump (HPFP) due to a mechanical defect in the Bosch CP4.2 high-pressure fuel pump (HPFP) that causes the pump to fail prematurely and destroy itself internally. The HPFP was replaced under the recall over two years ago, only for the new fuel pump to fail catastrophically and send parts through the fuel loop. The failure has been confirmed by a manufacturer dealership service center (Huntington Beach, CA). The failure lead to immediate engine shutoff while driving in traffic. The vehicle could not be moved out of a busy street under its own power. There were no warning signs prior to failure.

Filed Apr 29, 2026 · Fuel system · 85,000 miles · FL

The contact owns a 2021 Ram 1500. The contact stated that the vehicle failed to start and was unable to be jump-started. The vehicle was towed to an independent mechanic to be diagnosed, and it was determined that fuel was not reaching the fuel housing. The contact was informed that the CP4 high-pressure fuel pump was previously replaced under an undisclosed recall in 2024. The vehicle was then towed to the dealer, who had previously completed the recall repair. The contact was informed that the secondary fuel pump located in the engine compartment needed to be replaced; however, the repair would be an out-of-pocket expense. The vehicle was not repaired due to the cost. The manufacturer was not contacted. The failure mileage was approximately 85,000.

Filed Apr 24, 2026 · Engine, Fuel system · NM

The vehicle experienced an overheating condition immediately after being picked up from dealership service on April 11, 2026. Within a short distance of driving, a warning appeared and the vehicle became unsafe to operate, requiring it to be pulled over and towed. The dealership later stated that coolant was low but also reported no leaks. This condition should have been identified and corrected while the vehicle was in their custody prior to release. The failure created a safety risk because the vehicle could not be operated safely on the roadway and required immediate removal from traffic. The issue occurred without prior warning before the failure following service.

Filed Mar 14, 2026 · Engine, Fuel system · OH

Wa driving with cruise on at 60 mph. Truck stalled with no notice, no warning lights or check engine light. All temperatures and pressures seemed okay at time of incident. Could not move electronic shifter into neutral, was stuck in drive. Alarm came up to shift to park, I did not shift due to moving at 55mph at this time. Coasted to a stop on side of the road. At about 2-3 mph, truck automatically shifted to park. I attempted to restart truck but engine just cranked over with no fire. Attempted 3 times and still nothing. Waited 20-30 min and attempted again and same result. Call for tow truck and had towed to dealership. While waiting for tow truck, had full power in truck, no warning lights. Checked fuses for fuel and found no issues. Did hear fuel pump engage when turned ignition to run. Checked oil level, oil was changed 800 miles prior to incident, oil was at full level on dip stick.

Filed Jan 27, 2026 · Engine, Fuel system · 102,000 miles · FL

The contact owns a 2021 Ram 1500. The contact stated that while driving 55-60 MPH, the vehicle stalled. There were no warning lights illuminated. The vehicle was taken to the local dealer, who replaced the high-pressure fuel pump under the federal safety agency Campaign Number: 22V767000 (Fuel System, Gasoline, Engine); with the additional repairs on the low-pressure fuel pump at the Owner's expense. The vehicle was partially repaired. The manufacturer was contacted and opened an investigation. The failure mileage was approximately 102,000.