It's on the opposite side of the throttle body from where the throttle cable attaches.
Are you getting any symptoms? A code 24 is often not the sensor itself, but deteriorated wiring or a bad connection, so don't replace it until you check it out.
You can see if it's working correctly by using a multimeter. With key on, voltage from center contact to one of the other two wires is about 0.7 volts with throttle closed, and roughly 3.7 to 4.0V volts at wide open throttle. You can also check resistance (preferably with an analog meter) between the center terminal and either of the outer ones. As you open the throttle, resistance should change smoothly with no skips. If it all checks out OK, the sensor is good.
Be sure to check the ground lug and wire connection at the driver's side rear corner of the block. That's the ground for your sensors, and if compromised it can trip fault codes.