Where is the throttle position sensor on a 2000 dodge ram 2500 diesel?

On a 2000 Dodge Ram 2500 with a diesel engine (likely a Cummins), the Throttle Position Sensor (TPS) isn't a separate, easily identifiable component like it is on gasoline engines. Diesel engines of that era use an electronic throttle control system, but the sensor is integrated into the electronic throttle body itself. There's no standalone TPS.

Therefore, you won't find a separate TPS; the sensor is part of the throttle body assembly. The throttle body is located on the intake manifold, near the air filter housing. You'll need to trace the wiring harness from the throttle body to find any related diagnostic connectors or potentially access points, but replacing it will likely involve replacing the whole throttle body assembly.