swathdiver
Full Access Member
My Magnaflow cats are doing just fine after 54K miles.
P0430 again and again and again
- Thread starter 992dr
- Start date
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P0430 is bank 2 are the O2 sensors slow to respond with a DFCO? mine is check engine with P0430 as well while ending a DFCO event my Short term fuel trim spikes to 34.5+( Bank 1 and Bank 2 ) which is the "MAX lean condition" (it's just pumping air?) there is also a mild lag time when exiting a DFCO, this could also be a Fuel pump issue...
if you have an OBD reader you can see if the voltages are "following" each other then the Cat may need replacement...
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992dr
Full Access Member
Sorry, I'm not sure what DFCO means or stands for. Google says deceleration fuel cut off. Is this correct?
If it could be read on a scanner, hopefully I will find out tomorrow morning as I have an appointment with my mechanic.
Gotta be honest, I know nothing about tuning or anything electrical. I'll bring it up to Vic in the morning and post an update in the afternoon.
Appreciate your input
George B
¯\_(ツ)_/¯
Don’t get sucked into overthinking this. It is going to be a bad cat…
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992dr
Full Access Member
I'm trying not to over think this haha
That's what I'm expecting/hoping
i'm betting it's not a Bad Cat the P0430 i'm getting is from inverse reading for the O2 sensor sensor 1 reading high(i.e 0.835v while sensor 2 is reading 0.135v that means the sensor is faulty if i;m getting inverse numbers...
it's only faulty Catalytic converter if sensor 2 is "following" sensor 1 that is a clear confirmed indication the cat has failed.....
also typically you get P0420 before you would get a P0430 code (or both the p0420 and p0430) as bank 1 typically fails first on most cars...
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992dr
Full Access Member
I got the results. Everything looks good. No misfires or any stored in the history, fuel trims look great and O2 sensors are all in check. He was pretty impressed with how well is was running and said it's running almost perfect.
We didn't do a cat pressure test but he did mention with 250k miles on the clock and them being original, it wouldn't be bad idea. That along with some O2 sensors and everything should be good to go.
I appreciate your info, it's all making more sense with every new comment.
Crazy how much you learn from members and techs haha. I certainly do appreciate the help from everyone.
So, the big question is - Would I be out of my mind for replacing my cats and O2s?
Again thanks for all the help
We didn't do a cat pressure test but he did mention with 250k miles on the clock and them being original, it wouldn't be bad idea. That along with some O2 sensors and everything should be good to go.
I appreciate your info, it's all making more sense with every new comment.
Crazy how much you learn from members and techs haha. I certainly do appreciate the help from everyone.
So, the big question is - Would I be out of my mind for replacing my cats and O2s?
Again thanks for all the help
treehan77
TYF Fiend
Results of what? What did you do?
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992dr
Full Access Member
Brought it to my mechanic to throw on the scanner to see what was going on with my 0430
I guess I didn't do anything, he pushed buttons.
I guess I didn't do anything, he pushed buttons.
treehan77
TYF Fiend
So you still have the code then?
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