P0430 code

[Vale-sierra]

Hello I'm new to this forum hopefully I can get some advice on how to fix this. Just went to orreilly auto parts because my engine light is on,I drive a 2008 GMC Sierra 1500 4.8 they scanned it and code P0430 was shown. Code description: Catalyst system low efficiency Bank 2. And to fix it they told me to replaced Bank 2 Catalytic Converter. How can I fix it? Or what sensor should I replaced? I would like to do it my self.

[Chevy Joe]

Sounds like they are telling you to replace the actual Catalytic Converter (not the sensor), first off not sure I would just replace one, if you're going to do it I'd replace both of them (the other one can't be far behind wearing out)

 

Also, can they reset it to get the light out? it may not come back on right away, The Catalyst system low efficiency reading will be different based on RPM and temps outside, I have read about reseting the light by driving 50 miles on the highway (after they "reset" it at the shop)

 

I Googled 2008 Sierra Bank 2 Catalytic Converter and got this pic:

(THE RED DOT is what they are saying to replace, it can be a hard job, don't like exhaust work myself)

 

[gmtech4]

Hello I'm new to this forum hopefully I can get some advice on how to fix this. Just went to orreilly auto parts because my engine light is on,I drive a 2008 GMC Sierra 1500 4.8 they scanned it and code P0430 was shown. Code description: Catalyst system low efficiency Bank 2. And to fix it they told me to replaced Bank 2 Catalytic Converter. How can I fix it? Or what sensor should I replaced? I would like to do it my self.

Never do what a parts store says , plus the cost would make you question doing it anyways

 

You should see a tech

[Vale-sierra]

Thanks a lot Joe, I did some research on what u told me and found a video on how to replace them it seems To be kind of easy. bank 2 sensors and 02 oxygen sensors are the same?

 

Thanks Govtech4 I want to try replacing this sensors and if it doesn't work I'll sure take it to a tech.

[Vale-sierra]

And they did reset it (check engine light) but it came back on.

[Chevy Joe]

Even if you replace the sensor, you still need to "clear the code" and then drive the truck to see what happens (if the error comes back)

 

I have seen people clear the code like this:

 

1) remove both battery cables from battery (pos and neg)

2) hold horm for 30 secs to drain any capacitors that might be holding some electric

3) put battery cables back on, light should be out

4) drive about 25 miles to see if light comes back on

 

Another thing you can do is Switch the post cat O2 sensors left to right and see if the code follows the sensor or not. If the code follows the sensor, the sensor/circuit is probably at fault. If the code stays the same, the cat is probably at fault.

 

Hows that for an old tech guy LOL ??

 

Let us know

 

Joe

[Duelin]

Try switching bank 1 sensor with bank 2 sensor and see if the code follows the sensor. If it does than its the sensor.

[Chevy Joe]

Try switching bank 1 sensor with bank 2 sensor and see if the code follows the sensor. If it does than its the sensor.

 

 

LOL, Great Minds think alike !! (read above)

[Duelin]

['01LS1]

OR pending which State you live in, it may be time to open the exhaust up a little & tune that out.

[Vale-sierra]

Yes I'll go ahead and do that I'm going to swap the sensors before I buy anything to see what happens. ?

That's the reason I sign up to this forum, nothing but pros and lots of good advices guys. Thanks

OR pending which State you live in, it may be time to open the exhaust up a little & tune that out.

[Vale-sierra]

I live in Texas, but I don't think I'm ready ? to do that right know.

I even want to take off my cold air intake I don't know if that's the reason my sensor went bad.

[gmtech4]

Even if you replace the sensor, you still need to "clear the code" and then drive the truck to see what happens (if the error comes back)

 

I have seen people clear the code like this:

 

1) remove both battery cables from battery (pos and neg)

2) hold horm for 30 secs to drain any capacitors that might be holding some electric

3) put battery cables back on, light should be out

4) drive about 25 miles to see if light comes back on

 

Another thing you can do is Switch the post cat O2 sensors left to right and see if the code follows the sensor or not. If the code follows the sensor, the sensor/circuit is probably at fault. If the code stays the same, the cat is probably at fault.

 

Hows that for an old tech guy LOL ??

 

Let us know

 

Joe

Not bad ol' tech but with only 19 posts .... My god man !!! Lol j/k

[Chevy Joe]

Not bad ol' tech but with only 19 posts .... My god man !!! Lol j/k

 

Ha Ha Ha.... Very Funny Rob!!

 

Don't exaggerate it was only 5 posts till I remembered that old trick LOL

 

(and that's counting your post too )

 

I see you ain't no Spring Chicken either, sometimes old brains take a bit to remember

 

Joe

[gmtech4]

Ha Ha Ha.... Very Funny Rob!!

 

Don't exaggerate it was only 5 posts till I remembered that old trick LOL

 

(and that's counting your post too )

 

I see you ain't no Spring Chicken either, sometimes old brains take a bit to remember

 

Joe

What ? Lol