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On a single cam ford focus 2000-2001 the cam position sensor is below the pcv valve. If looking at the engine it is on the right side, rear, about a 3inches from the top of the engine.
Using a Digital Multimeter set to 2k,..the resistance should be 200 to 900 ohms ifnot replace,
location of throttle position sensor
the crank potion sensor is located under the front end of the car directly in front of the transmission. Actually when you look at it, it almost looks like it goes in to the trans.
The 2001 Ford Focus transmission range sensor is located on the side of the transmission. The sensor will be on the left-hand side of the transmission.
Check out the related link for a video on how to replace a crankshaft position on a Ford Focus SE.
with the maf sensor
i found it easier to remove the throttle body to access the tps sensor. the screws can be somewhat difficult to loosen due to corrosion and position of the sensor.
Check the throttle position sensor
the speed sensor is located at the rear of the transaxle behind the driveaxles.
Again, check the wires. If the computer hasn't been compromised (damaged, bent case or a piece of metal through the side) you should focus on the wires INTO the computer and the connectors.
It is located before the Calaytic converter