Oil pressure is extremely important to your engine if not the most important aspect of your diesel engine. If your truck is showing no oil pressure on your gauge but you have verified that oil pressure is present, you may have a failed oil pressure sensor. Replace a failed oil pressure sensor with a genuine Cummins Replacement Oil Pressure Sensor. This sensor from Cummins is designed to meet or exceed factory specifications. For 2002 Dodge Ram 5.9L Cummins truck owners, you must check and see if your factory sensor uses a 3-wire connector. If your truck has a single wire connector, this sensor will not work on your application.