I recently took my car to the dealership because I need to get it smogged and can't figure out how to fix this code. Have changed o2 sensors multiple times, fuel pressure regulator, and plugs.

The dealership said:
"CONFIRMED CONCERN. FOUND ENGINE CODE P1273 A/F SENSOR1 B1.SMOKE TESTED VEHICLE AND FOUND PCV HOSE FROM AIR DUCT BOOT TO ROCKER COVER TO BE LEAKING. RECOMMEND REPLACEMENT OF THE AIR DUCT BOOT, PCV HOSE, AND RELEARN OF THROTTLE BODY."

They wanted $800 so I said no and decided to tackle it myself. Bought the hose set from z1 and replaced the items circled in this photo (not my photo)


I did the whole pedal dance to reset the ecu and did the throttle body relearn. After about 20 or so miles, the code P1283 was pending and after another 20 or 30 miles, my check engine light came back on.

I'm a little frustrated and worried because I need to get smog done by the end of the month. My mechanic friend who runs a shop actually told me to take it to Nissan after they had it in their shop for a week or two. After I sent him the service report he told me to just sell the car 😭

Any help would be appreciated, I am in the Sacramento area.

 

bump

 

bump 🙃

 

Air and fuel mix error, cars running lean to mych air, check for exhaust leaks before the 02 sensors, check fuel injectors are working properly, do a smoke test to check for intake leaks

 

What would be a good way to check for exhaust leaks? My vaccum tubes are airtight from my testing but I'm not sure on how to test my exhaust

 

U can always take out an o2 sensor and smoke it, or do it from the tail pipe, add smoke!