Make sure the car has not been used in a couple hours. If it has been used recently its parts will still be hot.

Lay under the car and locate the crank shaft position sensor. The sensor is located between the engine and the transmission near the front driver's side wheel. It is directly behind the rack and pinion.

Use the 10mm wrench or socket wrench to loosen the 10mm Hex Head bolt attaching the crankshaft position sensor to the car. If the bolt is rusted use a penetrating lubricant to remove the rust.