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O2 sensor Reading all zeros can't seem to find the cure S90-V90

posted by  CT Bob on  Wed Jan 24 09:37 CST 2018
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That is normal. Somewhere we read that the rear sensor is not supported by OBDII on that car.

The car will never clear all the monitors, either. Mine passes OBD II emissions with 6 incompletes so there is a waiver built right into the system. Some states will do a tailpipe test, according to research. CA, NY, NJ, all have waivers.

I spend a couple of days running a very detailed drive cycle to clear the monitors and finally said screw it, I am going to go and get it failed. I had the station pull up my previous test and *boom* 6 incompletes and it passed. Only three complete monitors.






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