Is your oil pressure reading erratically on your 5.9L Cummins? If so, chances are its just the sensor that needs replacing. This is a genuine Cummins Replacement Oil Pressure Sensor that is designed to meet or exceed factory specifications. For 2002 models, you must check your connector. This is designed for trucks with a single wire connector, if your truck has a 3 wire plug, this sensor will not work.