NHTSA Complaint #11681316 — 2015 DODGE DART

The contact owns a 2015 Dodge Dart. The contact stated that while driving at various speeds, the vehicle vibrated and failed to accelerate as intended while depressing the accelerator pedal. In addition, there was an abnormal sound coming from the engine. The contact stated that while starting the vehicle, an abnormal sound was heard. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic; however, no cause for the failure was found. The contact stated that the spark plugs, ignition coils, catalytic converter, and oxygen sensors were replaced. The failure persisted and had progressively worsened. The vehicle was taken back to the independent mechanic. The vehicle was diagnosed with DTC: P0304 (Misfire in Cylinder #4). The contact was informed that the catalytic converter was turning red from overheating. The contact stated that there was an abnormal fuel odor coming from the engine and entering the vehicle through the A/C vents. The contact was informed that the air-fuel ratio was off due to an imbalance. The vehicle was not repaired due to the cost. The manufacturer was notified of the failure. The failure mileage was approximately 140,000.