Code 176 95 Mark

[my95mark8]

I have a code 176, heated oxygen sensor indicates lean condition on left side.
Do I replace the sensor? Or find out why I am lean?
Thanks.

 

[Frogman]

How many miles on the mark?

There is a good chance the sensor is bad if you have ~100K on it. You may want to replace both of them (not fun on a stock exhaust).

 

[my95mark8]

97xxx miles. Looks like I gotta order some sensors...
The light comes on after about 20 minutes. Then it runs a bit rough.
Also, I am getting about 16 mpg.....all city driving, I go on the highway about twice a month.