I took my Acura NSX in for the California smog test and it passed with no problems -- except it showed several readiness monitors were "not ready".
The technician suggested driving on both the freeway and surface streets, then bringing the car back for a recheck. It didn't help so now I've been researching what appears to the magic associated with getting the car to check its own sensors.
From what I've read, it requires performing "drive cycles" and doing all sorts of slow, freeway, and stop-and-go maneuvers. This is the craziest thing.
I guess it's all because I changed a heated O2 sensor a few months ago and reset the codes.
Now I have to drive the car from a cold start and do several independent drives to try to get the readiness codes to read "ready". Some sites state you may have to drive many hundreds of miles before the engine will recheck these sensors.
Has anyone else had this problem?
Thanks,
- Russ in Santa Barbara