P0430? What to do?

[staircasesurfer]

Originally Posted by JFP in PA

What he should be doing is comparing the O2 sensor voltages before and after the cat, if the voltage traces are following each other, the cat is toast.

This is what I was checking on each bank, I reread my post and I wasn't very clear, sorry for the confusion. I am getting tracing on bank 2, Pre & post 02 voltage. Bank 1 looks fine.

[JFP in PA]

Originally Posted by staircasesurfer

This is what I was checking on each bank, I reread my post and I wasn't very clear, sorry for the confusion. I am getting tracing on bank 2, Pre & post 02 voltage. Bank 1 looks fine.

Are they both moving the same (straight line or sine wave like cycle)?

[staircasesurfer]

Originally Posted by JFP in PA

Are they both moving the same (straight line or sine wave like cycle)?

Sine wave

[blue62]

Originally Posted by staircasesurfer

Sine wave

Yes that does look like a bad "Cat" waveform.
The green trace shows no bias to the rich or lean side.
The post O2 sensor is moving over the normal range so the sensor is good.
It does not bias to the lean side so no exhaust leak.
Looks like a new "Cat" is needed.

[staircasesurfer]

Originally Posted by blue62

Yes that does look like a bad "Cat" waveform.
The green trace shows no bias to the rich or lean side.
The post O2 sensor is moving over the normal range so the sensor is good.
It does not bias to the lean side so no exhaust leak.

Damn, I was hoping this was not the case with OEM converters being $$$, CA is kind of a PITA with non-OEM "modifications" to smog equipment. I am not sure if I can get a set legally from a junkyard/dismantler around here with all of our regulations. Probably will need to buy off Ebay or get lucky and find one from a forum user. My understanding is that S 3.2L and non-S 2.7L have different sizes.

[blue62]

Originally Posted by staircasesurfer

Damn, I was hoping this was not the case with OEM converters being $$$, CA is kind of a PITA with non-OEM "modifications" to smog equipment. I am not sure if I can get a set legally from a junkyard/dismantler around here with all of our regulations. Probably will need to buy off Ebay or get lucky and find one from a forum user. My understanding is that S 3.2L and non-S 2.7L have different sizes.

Yes it sucks that they are so costly.
I am not sure if the 3.2L VS 2.7L require different sizes.
What was the engine RPM when you took the screen shot of the above O2 sensor readings???

[maytag]

Originally Posted by staircasesurfer

Damn, I was hoping this was not the case with OEM converters being $$$, CA is kind of a PITA with non-OEM "modifications" to smog equipment. I am not sure if I can get a set legally from a junkyard/dismantler around here with all of our regulations. Probably will need to buy off Ebay or get lucky and find one from a forum user. My understanding is that S 3.2L and non-S 2.7L have different sizes.

I have a set from an '04 S with 85k miles.
Message me if you're interested.

Sent from my SM-G970U using Tapatalk

[staircasesurfer]

Originally Posted by maytag

I have a set from an '04 S with 85k miles.
Message me if you're interested.

Sent from my SM-G970U using Tapatalk

Thank you Maytag, I am looking at a set here locally in CA that another forum member has posted for sale, if this falls through I may take you up on them.

Thanks again!

[Gilles]

Originally Posted by staircasesurfer

I am not sure if I can get a set legally from a junkyard/dismantler around here with all of our regulations.

Staircasesurfer, I don't believe that you would be able to buy a cat (legally) from a wrecking yard in CA... :-(
.

[Qingdao]

Originally Posted by Gilles

Staircasesurfer, I don't believe that you would be able to buy a cat (legally) from a wrecking yard in CA... :-(
.

Why? Wouldn't recycling/reusing an item that reduces CO output be a good "eco" thing?