2014 Western Star 4800 Diesel Emission Components
- Walker Products®Nitrogen Oxide SensorWestern Star 4800 12.8L 2014, Nitrogen Oxide Sensor by Walker Products®. Location: SCR Catalyst Inlet. The Exhaust Gas Recirculation Valve, also referred to as EGR, meters the exhaust gas that is being recirculated into the intake...Valve gets stuck in the closed or open position due to a build-up of dirt, debris, or carbonClogged catalytic converter$387.77