Engine light on and OBD code is P1284 has anyone experience this? I was looking at the Service Manual it seems a lot of visual checks. Should I just replace a couple sensors or what? Any ideas or assistance is much appriciated..

P1284 NISSAN Possible Causes

Faulty Air Fuel Ratio (A/F) Sensor 1 Bank 2
Air Fuel Ratio (A/F) Sensor 1 Bank 2 harness is open or shorted
Air Fuel Ratio (A/F) Sensor 1 Bank 2 circuit poor electrical connection
Low fuel pressure
Faulty Fuel injector
Intake air leaks

04pathse wrote: ↑

Tue May 26, 2020 4:46 pm

P1284 NISSAN Possible Causes

Faulty Air Fuel Ratio (A/F) Sensor 1 Bank 2
Air Fuel Ratio (A/F) Sensor 1 Bank 2 harness is open or shorted
Air Fuel Ratio (A/F) Sensor 1 Bank 2 circuit poor electrical connection
Low fuel pressure
Faulty Fuel injector
Intake air leaks

If I replace the O2 sensor would that do the trick?

Update: Replaced the 02 sensor 1 Bank 2 and it got rid of the engine light. Now I am having some hard starting problems. It would start then if you drive far then turn off the engine and then start again it will just turn but not go through. I think I tried starting about 4 times then finally it started. I made 3 stops and same results. I think it's the alternator. What would be the best way to test the alternator?