fail CA smog
I have recently purchased a 2008 m3 and I need to get it smog check. It passes all emissions tests but testing OBD self tests it spits out "not complete" for Catalyst and Oxygen Sensor.
I took the car into BMW and they say they are getting no errors. I hooked up a OSB sensor tester myself, I get link errors and can get no readings what so ever. Bad fuse?? but would BMW find that?
I am not sure what to check next and any recommendation would be grateful.
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