O2 sensor issues/solutions

[purple1]

My 2000 Caddy keeps getting codes. One is a P0420 Catalyst System Efficiency Below Threshold (Bank 1). I have replaced the converter as that was suggested. But it keeps it up. Think I should just replace the O2 sensor? I also found some other products when searching for a new sensor. What about one of these solutions?

http://www.magnumtuning.com/en/detail/lambda-eco-economizer/cadillac/seville

http://www.magnumtuning.com/en/detail/ez-cel-fix-oxygen-sensor-simulator/cadillac/seville

Any ideas?

[rUNCHARGER]

16 years old, it could be original. I would replace the O2.

Sheldon

[purple1]

16 years old, it could be original. I would replace the O2.

Sheldon

True, it could be original. However the computer runs a test on both O2 sensors first. Then it runs the efficiency test. That's why I replaced the cat. This code said the cat was the problem, not the sensor. But I will replace both the upstream and the downstream sensors anyway.

I was really wondering about that eco-economizer. Any one think that things claims are for real?

[73440]

http://www.obd-codes.com/p0420

 There are a couple other items maybe you can check rather than replace them both right now

[purple1]

I think I'm just going to trade this thing in. I'm sick of working on it. Every thing I have done to it so far has been a pain in the a$$.

[purple1]

No more worries. The Caddy is now gone. Told ya this morning I was sick of it. Look what came home in its place.





A 2010 Challenger R/T 

[73440]

Nice, out with the old in with the new quick.