Clean the EGR differential pressure sensor and adapter mounting surfaces. Remove any dirt buildup or soot residue.
Inspect the EGR differential sensor bracket for cracks or fretting. If any damage is present, the sensor must be replaced. The bracket is not a serviceable component.
Make sure the sensor is installed correctly. There is a locating feature, or raised nub, located on the EGR mass measurement flow assembly to aid in the installation of the sensor. When the sensor is installed correctly, it will sit flat on the EGR mass measurement flow assembly and will clear the raised nub.
Start the engine and verify proper operation (no fault codes).
NOTE: An active EGR differential pressure sensor fault code requires a certain procedure, once the repair is complete, to get the fault code to go inactive.
NOTE: The engine must be started and the engine coolant temperature must be above 68°C [154°F]. The intake manifold air temperature must be above 7°C [45°F].
NOTE: Shut the keyswitch OFF for 30 seconds and turn the keyswitch back ON. The fault code will then transition to inactive.