O2 sensor replacement interval

[Brett Dikeman]

At 7:41 PM -0800 11/8/01, Efraim Gavrilovich wrote:
>Can someone answer this question? For last two days my 5KTQ has periodical
>erratic idle, hovering at times between 900 and 1100 RPM.  I replaced O2
>sensor about a year ago. Could it be due for replacement?
>TIA,
>Efraim Gavrilovich
>1988 5KTQ 335,000km (208K mi), 1.8 Bar
>1990 90 111,000km (68K mi)
>Vancouver, Canada

Unlikely, unless you put more than 50,000+ miles on the car in the last year.

They will fail more quickly if there are problems such as burning oil
or serious mixture problems.  Deposits will form on the sensor
slowing or stopping its response to exhaust gasses.

I'd look elsewhere, at the sensors and components involved in the
idle regulation functions.  Stuff like the throttle position sensor
switches(mainly, the idle position switch), the idle stabilization
valve, etc.

B

--
----
"They that give up essential liberty to obtain temporary
safety deserve neither liberty nor safety." - Ben Franklin
http://www.users.cloud9.net/~brett/
http://www.users.cloud9.net/~brett/bdikeman.asc	(PGP Public Key)