what's up max family, got a question. I recently replaces the front cat on my 03 se. after doing so drove the car for 200 miles no check engine lights no nothing, I take it in the emissions passed but the rest of the testing didn't because the cat and 02 sensor is in a NOT READY status. Drove it for another 200+ miles took it back today and I get the Sam results 02 and cat not ready. does anyone have any idea what could be happening?

 

I had the same problem I waited a month and I finally passed today I think you might need to give it more time.

 

You need more cycles probably. Turn the car off and on more and do short trips. If you're doing long trips, then this is probably the problem.

Also, replace the rear precat NOW (shouldn't have replaced the front ).

 

What state?and check the emission testing laws because some allow 2 monitors not ready.

 

Only upto 2000 model years, later cars can have only one monitor not ready.