Hi there. The code p0420 (https://www.yourmechanic.com/article/p0420-obd-ii-trouble-code-catalyst-system-efficiency-below-threshold-bank-1-by-jamahl-walker) is present for the O2 sensor behind the catalytic converter has detected the air fuel ratio is not within the limits. The code p1283 (http://www.autocodes.com/p1283_nissan.html) is present for the air fuel ratio sensor is...
The two code are for two different issues and if both codes were not fixed, or after the repairs the engine self learn was not reset, then the light may come back on and the car not run correctly. I...
