My wife’s car has the check engine light on and she was told by her mechanic that it was the catalytic converter going out, to ignore it. I am thinking that I ought to be able to build a jumper for the sensor and fool it into thinking that it is working, reset the check engine light and wait till i…

Nope, that sensor keeps your engine running correctly. And I question the mechanic saying the cat’s bad, it could just as easily be one of the oxygen sensors not working correctly. Have they been replaced?

My wife says no. Where would you start with this? I’ll have to look at the scope we have at work and see if we have anything that will hook up to this car. I’m used to Cummins and Cat but not GM.

Since the light is on except when there is no problem, your only option for getting rid of the light is some black tape over the lamp. The problem with that and with ignoring the light is that you will never know when it is telling you of a more serious pending problem that could become more seriou…

You can’t jump the O2 sensor connector to turn the light off. The O2 sensor produces it’s own voltage signal to the computer. So if you jump the O2 sensor connector the computer won’t see any voltage signal and will keep the Check Engine Light on. Tester

There are rumors out there that putting the downstream O2 sensor on a spark plug de-fouler will trick the system. Just rumors mind you.

The down-stream sensor CAN be spoofed, but it’s tricky and hardly worth the effort. I would REPLACE that sensor and see if that doesn’t cure the problem…Oxygen sensors don’t last forever…

Me, I would look at the signals coming out of the sensors before I replaced anything.

@caddyman - Oxygen sensors don’t last forever… I’ve replaced only ONE…and that was because the guy who did my clutch forgot to screw it back in tight. Outside of that…NEVER had to replace one…even after 300k miles. While they may not last forever…they sure to last a long long long time.

A jumper won’t “fool” anything. The ECU will still not see the proper signal and will trip the light fantastic. Like Circuitsmith, I’d look at the sensor outputs before changing anything. I found a cool site on how to interpret the O2 sensor output signals Perhaps it’ll help. http://www.aa1car.com…

Can I disable the catalytic converter sensor on my wife's car?

Maintenance/Repairs

gm289 February 6, 2012, 9:04am 2

Maybe I ought to call in. T and R would have fun with this call!

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Can I disable the catalytic converter sensor on my wife's car?

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