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Old 08-09-2021, 02:21 AM
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Join Date: Sep 2008
Location: San Jose, CA
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OBDII O2 Sensor Not Ready

My 2005 X5 (E53) failed SMOG test recently with O2 sensor not ready. Although I had a battery change, that was over 3,000 miles ago. I've performed the drive cycle four times (using various procedures found on the Internet). I'm starting to suspect bad O2 sensors. However, there's no check engine light.

By using a OBDII scanner, I got the oxygen sensor data. Can someone tell me whether I have bad sensors by looking at the data (see attached screen shot)?
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o2 sensor, obdii, oxygen sensor, smog


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