700 Turbo -O2 sensors?

Both my 700T cars run fine.
I am taking my 89-780T through emissions, today.

I wonder if O2 sensors wear out or just fail.

Is there a life-time limit?
Should they be replaced as a maintenance issue?

Bill @ Home in Wisconsin, USA
Maroon 1989 760 Turbo wagon! w/140k miles ;-}
Black! 1989 780 Turbo Coupe w/146k miles 8-}
Blue Mule 1987 245 non-Turbo w/205k miles SOLD

 

O2 sensors sometimes fail. They don't really wear out, but as the
sensing surface gets contaminated, so they act as though they are
wearing out. Bosch recommends heated (your type) oxygen sensors to be
checked/replaced every 60,000-100,000 miles.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

 

O2 sensors sometimes fail. They don't really wear out, but as the
sensing surface gets contaminated, so they act as though they are
wearing out. Bosch recommends heated (your type) oxygen sensors to be
checked/replaced every 60,000-100,000 miles.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

 

I can see how the 3 (OEM) inlets could get plugged.

Thanks, My 780 failed. I then, replaced the O2 sensor.
I will take it through emissions, again, next Saturday.

I put in new plugs and cleaned the throttle body assy, again.
It did not fail badly. I won't post the readings.

Both the plugs and the O2 sensor had a fine gray dust on them.
The sensor was not a hard job, with the right tools!
I used a generic and spliced it in.
Next time I will just clean it off with carb cleaner or whatever
solvent will remove the crust.

I do not see a performance improvement with the new sensor.
The 780 runs pretty good. But, then it did, before.
Maybe it responds a little more solidly.

I next want to learn to adjust my boost.
I have a Garret on the 780.
I am cleaning up that linkage at the back.

Regards,

Bill @ Home in Wisconsin, USA
Maroon 1989 760 Turbo wagon! w/140k miles ;-}
Black! 1989 780 Turbo Coupe w/147k miles 8-}
Blue Mule 1987 245 non-Turbo w/205k miles SOLD