Keeping you Ready for the Road Ahead™, the Dorman Crankshaft Position Sensor properly monitors the engine’s crankshaft rotational speed and position. This information is relayed to the Engine Control Unit (ECU) to accurately time the opening and closing of the engine’s valves and fuel injection for accurate combustion. Dorman has a distinguished reputation in the heavy duty truck and trailer aftermarket, manufacturing a variety of parts for a complete repair. Through advanced engineering, Dorman successfully checks into today’s most common failures to figure out the why, ultimately delivering modern solutions that not only match OEM parts, but solve known issues. FleetPride is your First Click in Heavy Duty®.