This function is used to check if the Exhaust Gas Recirculation (EGR) temperature sensor is working and check the status on the EGR cooler. If the sensor should show a value above limit due to extreme driving or malfunction in the cooler, the Engine Control Module (ECM) will derate the engine to avoid damage.
Conditions for diagnostic trouble code (DTC):
1) The sensor value is not within an expected range
Observable symptoms
1) None
Probable cause
1) Sensor
2) Connector
3) Wiring harness
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