Hey was hoping someone could help with my emissions issue.
I was throwing 4 codes a few weeks ago.
CODES:
PO455
P1800
P1448
POO57 - HEATED OXYGEN SENSOR - BANK 2 SENSOR 2

I replaced a bad o2 sensor and bad emissions valve and can which got rid of all the codes except the P1800. My cars system was reset and codes were removed.

I drove the car for i think 2 weeks after this work was done and put at least 150miles on it and i have failed my emissions test twice. I dont have a check engine light but my emissions report shows i have two monitors that are not ready.

SYSTEM MONITORS

COMPREHENSIVE COMPONENT - READY
ENGINE MISFIRE - READY
EVAPORATIVE CONTROL SYSTEM - READY
HEATED OXYGEN SENSOR - READY
FUEL SYSTEM PERFORMANCE - READY


CATALYTIC CONVERTER EFF. - NOT READY
OXYGEN SENSOR - NOT READY

I also still have one code p1800 but with no CEL. Does anyone know why my monitors have not reset or are not ready yet? Im not sure what to do at this point. Do I put more miles on the car? will it take time? Or is something wrong?

Any help would be appreciated. thanks

 

What year is your vehicle?