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Trouble code P0302 means:Cylinder 2 misfire detected
It could be that the distributor was not the problem. Need to know what the code is and what engine you have.
Trouble code P0174 means: System too lean (Bank 2)
Sounds like you need to replace the thermostat.
Bank 1 catalyst efficiency failure. The catalytic converter has failed.
You have a small EVAP leak, possibly a loose or faulty fuel cap.
each code is different
No such code B0265. P0265 however means = Cylinder 2 Injector Circuit High.
Catalyst efficiency below threshold. (The catalytic converter may be failing.)
knock sensor
A code reader that will work on the OBD I system.
It's a code for the oxygen sensor.