Hello all,

I am killing myself trying to get solid verification on the O2 sensor
location/s for this vehicle (see subject line). I have replaced the O2
sensor at the Œy¹ collector pipe just upstream of the cat but I¹m wondering
if there¹s another that I should hunt down and replace? My Chiltons, Hayes,
and dealer parts/tech have been of minimal help thus far unfortunately. A
friend of mine had a Œ96 that has 4 O2 sensors but I can only find 1 on my
Œ95. If anyone needs a quick removal tip * I ran the engine for 5 minutes
and then used a 7/8 box end wrench with a nice 3lb mallet * no problems.
Backto the issue at hand - I assumed that because it¹s an OBD2 system
(switchover year), it would need at least 2 sensors to employ Œrationality¹
and Œcompare¹ voltages?? Can anyone tell me for sure?? My datastream shows
2 sensors but I can¹t for the life of me find the other one * when I do an
ŒO2 sensor test¹, it only tests the one location 1. Maybe someone with a
FSM could verify this for me??

Any help would be appreciated!
Thanks!
Andrew.

On May 16, 11:50Â*pm, AWN <anix... (AT) cogeco (DOT) ca> wrote:
isnt there one after thre cat, downstream?

95 Jimmy SLT 4x4 (W series 4.3L) - stupid O2 sensor location questionthe 95 jimmy has only 1 O2 sensor 96 and up have more, the OBD2 system came in 96 for most vehicals while some were obd2 compliant earlier.
"AWN" <anixon1 (AT) cogeco (DOT) ca> wrote


Hello all,

I am killing myself trying to get solid verification on the O2 sensor location/s for this vehicle (see subject line). I have replaced the O2 sensor at the 'y' collector pipe just upstream of the cat but I'm wondering if there's another that I should hunt down and replace? My Chiltons, Hayes, and dealer parts/tech have been of minimal help thus far unfortunately. A friend of mine had a '96 that has 4 O2 sensors but I can only find 1 on my '95. If anyone needs a quick removal tip - I ran the engine for 5 minutes and then used a 7/8 box end wrench with a nice 3lb mallet - no problems. Backto the issue at hand - I assumed that because it's an OBD2 system (switchover year), it would need at least 2 sensors to employ 'rationality' and 'compare' voltages?? Can anyone tell me for sure?? My datastream shows 2 sensors but I can't for the life of me find the other one - when I do an 'O2 sensor test', it only tests the one location 1. Maybe someone with a FSM could verify this for me??

Any help would be appreciated!
Thanks!
Andrew.

Apparently mine does have 2 O2 sensors. I finally found it downstream of
the cat before the muffler. My 95 has 2 but I don¹t doubt that there are
other variations as this build was a little whacky for that year (OBD1,
OBD1.5, OBD2 all in the same year as far as I understand it).

Thanks.
Andrew.



in article jM53i.192991$aG1.63060@pd7urf3no, qwerty at qwerty (AT) qwerty (DOT) com
wrote on 5/17/07 7:43 PM:

indeed there is... I can't believe that I missed that after hunting and
hunting... Do I feel stupid. Ah well... at least they've both been
swapped out now...

Thanks.
Andrew.




in article 1179424907.424187.291280 (AT) n59g20...oglegroups.com, vwtopdown
at vwtopdown (AT) gmail (DOT) com wrote on 5/17/07 2:01 PM:

Re: 95 Jimmy SLT 4x4 (W series 4.3L) - stupid O2 sensor locationquestionthanks for the info, my manual like yours only mentions the one
"AWN" <anixon1 (AT) cogeco (DOT) ca> wrote

Apparently mine does have 2 O2 sensors. I finally found it downstream of the cat before the muffler. My 95 has 2 but I don't doubt that there are other variations as this build was a little whacky for that year (OBD1, OBD1.5, OBD2 all in the same year as far as I understand it).

Thanks.
Andrew.



in article jM53i.192991$aG1.63060@pd7urf3no, qwerty at qwerty (AT) qwerty (DOT) com wrote on 5/17/07 7:43 PM:


the 95 jimmy has only 1 O2 sensor 96 and up have more, the OBD2 system came in 96 for most vehicals while some were obd2 compliant earlier.