Quote:
Originally Posted by LA_M2
Thanks in advance for your help.
I recently brought my car in to get a smog test. It's required in CA to register an out of state car. The guy said that he was only able to get reading from 3 out of 4 oxygen sensors. The 4th one seem to have not fired yet. This might be a result of a recent service where the O2 sensor was loose after some service and they had to reset it. He said I have to drive around for at least 20miles, on the highway, staying above 55mph. I did that, I think.
Anyway, I have VGate and Bimmerlink, I also have Bimmercode. What values in Bimmerlink can I monitor to see if that all 4 O2 sensors have fired. I think only 1 was listed as Oxygen while others are listed as Air something. If you know if have sensor values I should be monitoring, please let me know.
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The drive cycle to get the sensors to ready state is complicated. It's more than just drive 20 miles on highway for BMW. Do a search for the drive cycle.
Also o2 sensors can be sensitive. If someone moved them around it's possible it's broken.