If the upstream and downstream sensors are the same, swap them (If the
downstream is still good) You truck will run perfectly with a malfunctioning
downstream sensor.It doesn't affect operations,it's for emission systems
testing only. You may get "the light" though.
Dr. Pat
----------
>> The upstream O2 sensor in my '96 318 has been giving me trouble
> codes
> (heater circuit malfunction, voltage too high, etc.) My truck is
> running in open loop all the time, and it must be pretty rich because I
> smell fuel. My gas mileage is about 13-14mpg too. :-P
>
> -Jon-
>
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