FREIGHTLINER recall on B2 SCHOOL BUS CHASSISBUSINESS CLASS M2,S2 SCHOOL BUS CHASSIS and 1 more model

On certain vehicles, a manufacturing error with the double-check valve module used in controls for the park brake interlock on school bus chassis or in the optional M2 work brake may affect vehicle braking capabilities. On vehicles with park brake interlock controls, the double-check valve may release air from the service and parking brakes when service brake is applied. On vehicles with work brakes, the work brake may not hold depending on weight, slope and air leak rate, or the stop lamps may intermittently not come on when the service brake pedal is applied. Correction: Dealers will replace the double-check valve module.