Is there anyone who has advice on what i should fix on my nissan maxima 1996?

Question

I had a couple a codes for my 1996 Nissan maxima.. A/F Sensor 1Bank 1, O2 sensor 1B1, Knock Sensor, EGCR solenoid/valve, and the EVAP Canister Purge Volume Control Valve. The car once turned on without being used for a couple of hours will idle fine, until you drive it for 20 minutes it will start to loose power and if you come to a stop it will die on you. I'm wondering which one of these is the main problem or do I have to change all of them..

Answer 1

P0130  02 sensor heater circuit malfunction

P1445 Purge flow sensor circuit high condition

P1440 EGRC solenoid valve

These code are all indications , the 02 sensor commonly reffered to instead of A/F sensor, then there the purge flow circuit high , for this there is no purge for a EVAP test, this is not going to cause the engine to stall out, But the EGR will. if it gets stuck in the open position when coming to a stop. The best test to do is for the test only, disconnect the EGR vacuum hose on the EGR. and test drive and see if the situation is duplicated. If there is no stalling you can suspect that the EGR solenoid has something to do with the stalling condition. This is just for the test don't drive the car with a EGR disabled, for long distance  the whole purpose for the EGR is to introduce inert gas into the combustion chamber this lower the temperature , and prevent not only Nox pollution but a hole in the piston