If your pathfinder happens to have a key code it will be in the glove box. But if it is a 1997 or older model it might not have it. Call dealer and see if they will give you a key code with your vin# but it will cost you if they have it for that year then you give it to a locksmith and he should charge you less.
Trouble code P0733 means:Gear 3 incorrect ratio
what that mean distributor signal interrupt
In a 1992 Nissan Pathfinder, the key code can typically be found on a label inside the vehicle. Check the driver's side door jamb or the glove compartment for a sticker that might have the key code printed on it. If the code is not there, you may need to contact a Nissan dealership with your vehicle's VIN for assistance in retrieving the key code.
code 34 = knock sensor/circuit
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Trouble code P1337 means: CKP Sensor (Ref)
Trouble code P0745 means:Pressure control solenoid malfunction
Trouble code P0400 means:Exhaust gas recirculation flow malfunction
Trouble code P0330 means:Knock sensor 2 circuit malfunction
Trouble code P0100 means:Mass or volume air flow circuit malfunction
Trouble code P0335 means:Crankshaft position sensor A circuit malfunction
P0113 Intake Air Temperature Circuit High Input check the intake air temperature sensor and wiring for problems. And you can take a scan tool to repair it, I think the Nissan consult3 is a good choice.