2021 Blue Bird SHL All American Diesel Emission Components
- Walker Products®Nitrogen Oxide SensorBlue Bird SHL All American 2021, Nitrogen Oxide Sensor by Walker Products®. The Exhaust Gas Recirculation Valve, also referred to as EGR, meters the exhaust gas that is being recirculated into the intake manifold. This exhaust gas...Valve gets stuck in the closed or open position due to a build-up of dirt, debris, or carbonClogged catalytic converter$426.54 - $446.35