Where is the oil sending unit located on a ford f150 4.2 1997 engine?

On a 1997 Ford F-150 with the 4.2L engine, the oil pressure sending unit is typically located on the driver's side (left side) of the engine block, near the oil filter. It's a small, usually one-wire, sensor. However, the exact location might vary slightly depending on specific engine configurations.

It's best to consult a repair manual specific to your 1997 Ford F-150 4.2L engine for a precise diagram and location. A visual inspection with the engine bay clean will also help you locate it. Look for a small sensor with a single wire connected near the oil filter and the general area described above.