PIP5237

This Preliminary Information communication provides information to the technician about vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0133 and or P22FA. Technician will need to inspect Heated Oxygen Sensor and the Oxides of Nitrogen Sensor 1 for soot build up. If the sensors are covered with soot replace both sensor should be replaced. Also tighten the air cleaner outlet duct to positive crankcase ventilation heater housing using welding wire. Technician should also ensure all five hose clamps between the air cleaner box and the turbocharger are tight.