Hello!
I have a 2000 Toyota Tundra V6 Base Model that won't pass smog in California, I have replaced the Up and Downstream O2 Sensors but still get the notice on my ODB2 Scanner that the Catalyst and the Evaporative systems have yet to report any data and that is what is causing the SMOG check to fail. There are no codes when I run a scan on all of the systems. The truck has been driven 400+ miles since the smog check last failed and it still will not report the data. All of the live data that the truck is reporting looks fine from what I can tell except for the two systems I mentioned. Any advice on what I can do to have this thing pass smog?
I misplaced the answer, Sorry.
Did you replace the O2 sensors with OEM sensors? Using a scan tool how do the numbers look for the upstream and downstream O2 sensors?
https://www.carparts.com/blog/how-to-test-an-o2-sensor/amp/
Also, see below:
https://repairpal.com/drive-cycle-issues
Sorry for the late reply, we replaced the upstream sensor with a new OEM sensor, and it stays steady at ~.655V while the downstream fluctuates from 0.0 - 0.91V. From what I have read an O2 sensor staying steady like that means something is wrong with the sensor, but we replaced it and the new sensor is still staying steady.
Did you use the OEM sensor? If so, the sensor might be faulty. Replace it again.
Also in California, for model year 2000-newer gas vehicles, you are allowed one incomplete monitor (it can only be the Evaporative System) in order to pass the ODB Test Monitor readiness.
See here:
I understand that you said you drive +400 miles, but try an OBD drive cycle:
