O2 Sensor

[tdvs]

Eliminated the cat. Should I remove the O2 Sensor also, or at least unplug it?

 

Tom

[ismellrealbad]

what car? more importantly just what year is it? if its after 96 you got obd2 and you have a sensor after the cat. to elminate the check engine light and pass emission testing youll need to either plug in a 'spoof' to trick the pcm (computer) in thinking its there or youll need the pcm reprogrammed to think the sensor is there

[BXX]

sensor

[Andrew]

never leave the 02 sensor that comes before the cat unplugged.

[jeremy]

if you are talking about the 2nd sensor immediately after the cat, the easiest bypass is to have that code removed with a PCM flash

[1990lumina]

Second easiest is a set of spark plug non foulers being installed, and the O2 installed into it. Works great for about $10

[tdvs]

It's a '95 3.4. Not having any problems. Seems to run just fine. Just wondering if it makes any difference having the censor still hooked up now that there's no cat. Thanks to all who have responded so far.

 

Tom

[Brian P]

A '95 3.4 you should just have the one upstream O2 sensor. Leave it plugged in and normally installed. It is the only way the PCM can determine if fueling is correct.