What 22 owners told NHTSA about the 2024 Toyota Prius Phev

The way the accelerator pedal sensor is positioned allows for water infiltration from wet carpet / tracked in snow and water. The component is available for inspection upon request. Once sufficiently saturated the sensor fails, and ceases function DURING VEHICLE MOVEMENT. The problem is reproducible but has not been confirmed as a pattern of failure by the dealership. As far as my recollection, the manufacturer hasn’t inspected the part. P2138 is the associated check engine code and the vehicle enters limp mode DURING TRAVEL. The check engine light (and subsequent problems) first appeared while in traffic on 2/10/2026.

NHTSA ODI 11721303

The contact owns a 2024 Toyota Prius. The contact stated that while parallel parking and straightening the vehicle, he tapped the accelerator pedal, and the vehicle suddenly accelerated aggressively and crashed into a stoop. While reversing previously on three occasions, the vehicle braked suddenly without application with no object in the surrounding area. There were no reported injuries. The air bag deployed. There was smoke detected from the engine. There was no reported fire. A police report was filed. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 3,000.

NHTSA ODI 11613797