There are two sensors. One is between the exhaust manifold and the cat. and the other is after the cat.
To recharge the AC on the 2002 Ford Escort ZX2 you need to use the low pressure fill port. It is located on the larger of the two hoses coming off the compressor.
picture of engine for a 1999 ford escort zx2. Looking at the engine block in the vehicle, the camshaft position sensor is located on the upper right of the block held in by one bolt and has a two wire weather-proof connector attached.
low pressure lines on ac units are the larger of the two
remove two screws, remove tail light, remove bulb. reinstallation is the reverse of removal.
On my 1998 zx2 it is located on the intake tube after the mass airflow sensor. It points to the front of the car and has two wires coming out of it.
They are of different size and travel of the piston in the strut bore. The mounting hardware is different on the two.
the variable cam timing (VCT) solenoid on the ZX2 can be found on the same side of the engine as the cam gears are on. The parts of the VCT are located on the exhaust cam and between the two cams
One sensor would be for your engine temperature gauge and the other sensor for the OBD II engine management system
The bumpers should be compatible between the two.
If you look on your drivers door, for a white tag it should tell you. There are two different sizes for this car, they are either 14" or 15" P185/65R14 P185/65R15
You need to remove your door panel to get to the screws (torx type) on the inside of the door. There's a plastic cover that pulls off so you can see/get to the screws. 3 of them as I recall. two close and one set deep. Power mirrors will have a cable that needs to be disconnected. Mine were manual and easier to replace. Good cheap replacements at http://www.carmirror.com/results/index.php?make=FORD&year=1999&model=ESCORT+ZX2