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Q: Where is the Bank 1 and Sensor 1 located? on 1996 Ford F-150

Is bank 1 left or right, and sensor 1 pre-cat? I have a P0133 code.
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It's the bank that has the #1 cylinder, so just follow your #1 wire from your distributor to the number 1 cylinder and there you have it. And, yes it is the pre-cat Oxygen Sensor.
this is a picture showing the bank 1 location.
for p0133:
The simplest thing to do is to reset the code and see if it comes back.

If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:

Check and fix any exhaust leaks
Check for wiring problems (shorted, frayed wires)
Check the frequency and amplitude of the oxygen sensor (advanced)
Check for a deteriorating / contaminated oxygen sensor, replace if necessary
Check for inlet air leaks
Check the MAF sensor for proper operation

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