Put the AED performance tune on my car the other night after changing a bad O2 sensor and drove it to work the next day (25 miles each way). I took it in this morning to get inspected and it showed O2 sensor not ready, resulting in a failure. Everything else is ready. I then drove it on the highway for about 60 miles round trip before bringing it back. It still failed. Are these cars usually this stubborn when it comes to the drive cycle completion?