JPP cat blown? P0420

[BabyFaceFinster]

Got my code scanner and manuals. Got P0420 code. I hear a "tinny, raspy" sound, just like Jim at Foreign Affairs. I reset the code. We shall see.

LENNY
_________________

[cdssolara]

That doesn't sound very promising. I hope that there's not a problem with the JPP cats.

[impactX]

P0420 - Catalyst system efficiency below threshold (V6 Engine)

Three-way catalytic converter malfunction
Open or short in heated oxygen sensor circuit
Heated oxygen sensor malfunction


So either the cat is not working properly or someone screwed up the Oxygen sensor behind the cat when they uninstall the sensor.

My suggestion? If the code pops up again, unplug and unscrew the O2 sensor and check it.

[cdssolara]

Where is the sound coming from? Can you hear it coming from the area of the cat, or does the sound come from the muffler area? Do you hear it at all rpm's or just at certain rpms? I'm curious because while doing some hard acceleration yesterday to see if the knock sensors would trip the CEL (they did), I started getting a buzzing sound from the area of my muffler at certain rpms. Although I get a lot of codes when doing an OBDII scan, I'm not getting the one that you have.

[BabyFaceFinster]

Where is the sound coming from? Can you hear it coming from the area of the cat, or does the sound come from the muffler area? Do you hear it at all rpm's or just at certain rpms? I'm curious because while doing some hard acceleration yesterday to see if the knock sensors would trip the CEL (they did), I started getting a buzzing sound from the area of my muffler at certain rpms. Although I get a lot of codes when doing an OBDII scan, I'm not getting the one that you have.

Under the car, middle to front. It is nice at idle and nice @3000/30-50mph. But wide open, It has this "not right sound", almost tinny, kinda castenet like. If the cat is blown, there will be broken pieces in in that I can yank out, I believe. I need to get under there next time. I also have bank 1 & 2 failures in my california edition engine (air/fuel vs. o2 sensors). Those came on 10 days after header install, but then went out. I figure the computer adjusted for the new open flow. Then it came on again, this time with the P0420. All this, and the car sounds bada$$ otherwise and runs great.

[Danny]

P0420 - Catalyst system efficiency below threshold (V6 Engine)

i got the same code last week got it cleared, then it came back on yesterday...

your not the only one...

im going to jpp on monday to have something installed i'll ask him about the code.

[BabyFaceFinster]

P0420 - Catalyst system efficiency below threshold (V6 Engine)

i got the same code last week got it cleared, then it came back on yesterday...

your not the only one...

im going to jpp on monday to have something installed i'll ask him about the code.

I think the cat is bad also, due to the noise. Also based on Jim at FA and his experience. I am going to have it inspected If that is the case, I am going to ask for a replacement and send it back.

[SC V6]

word.. I have the Jpp exhaust system 2.. tell them it has a few problems... and keep me in the loop

[kubi]

I got that same code on my stock 02 about a year ago. Got a new catlytic converter under warranty.

[JoeB]

I have the full JPP exhaust system also and had that error code a little while ago. The problem for me was my car was running a little rich on the top end. That was corrected. I cleared the code with my OBD2 reader and it hasn't come back. Are you sure your mixture is correct? If the cat is blown, that is different but it may have been more to do with an impropper mixture than something to do with a problem in the cat. Those guys do great work and take the research and testing very serious. -JoeB

[BabyFaceFinster]

I have the full JPP exhaust system also and had that error code a little while ago. The problem for me was my car was running a little rich on the top end. That was corrected. I cleared the code with my OBD2 reader and it hasn't come back. Are your mixture is correct? If the cat is blown, that is different but it may have been more to do with an impropper mixture than something to do with a problem in the cat. Those guys do great work and take the research and testing very serious. -JoeB

When I get on it hard, there is a terible sound coming from under the car. It is a tinny, castinet like sound, not an exhaust leak.Jim at Foereign Affairs had his cat blown. He pulled chunks out (he thinks he killed it bu running a different fuel system. Min however, is a stock fuel system. How would one correct a rich fuel mixture? I thought the computer handles that. I also got an 1153 code, which is an air fuel sensor ( I have a california edition) Toyota initially diagnosed it as both Bank 1 sensor 1, Bank 2 Sensor one, saying both were blown. I hooked up the code reader. Only one of 'em is sending the code now. Can this be related?

[BabyFaceFinster]

I have the full JPP exhaust system also and had that error code a little while ago. The problem for me was my car was running a little rich on the top end. That was corrected. I cleared the code with my OBD2 reader and it hasn't come back. Are your mixture is correct? If the cat is blown, that is different but it may have been more to do with an impropper mixture than something to do with a problem in the cat. Those guys do great work and take the research and testing very serious. -JoeB

When I get on it hard, there is a terible sound coming from under the car. It is a tinny, castinet like sound, not an exhaust leak.Jim at Foereign Affairs had his cat blown. He pulled chunks out (he thinks he killed it bu running a different fuel system. Min however, is a stock fuel system. How would one correct a rich fuel mixture? I thought the computer handles that. I also got an 1153 code, which is an air fuel sensor ( I have a california edition) Toyota initially diagnosed it as both Bank 1 sensor 1, Bank 2 Sensor one, saying both were blown. I hooked up the code reader. Only one of 'em is sending the code now. Can this be related?

[JoeB]

I can't say more than my personal experience but I had multiple codes including the cat and 2 other when my mixture was running rich. After correcting and clearing the codes, they haven't returned. I was only running rich for some minutes though and I don't have the sounds you have. I'm wondering if it was running rich and it blew it. I corrected the mixture from my S-AFC-2 when it was in use. Have you talked to the guys at JPP yet? -JoeB

[Stock Solara SEV6]

All my experience is related to my POS Taurus SHO, but here goes anyway. I installed the wrong spark plugs, got moisture under the plug wire boots, shorted out the plugs causing a rich mixture to the cats (plural). I corrected the spark plug error when I noticed the bad miss, but it destroyed the cats due to this 10 minutes of running rich. They made a strange rattling noise, then finally came apart and plugged up the exhaust system. A little later (while trying to accelerate hard) I finally built up enough pressure to blow the guts of the cats right out of the exhaust. Ran good after that, but still had to spend about $700 to get the cats replaced! So I would say running rich, can kill the cats fast.

[BabyFaceFinster]

I can't say more than my personal experience but I had multiple codes including the cat and 2 other when my mixture was running rich. After correcting and clearing the codes, they haven't returned. I was only running rich for some minutes though and I don't have the sounds you have. I'm wondering if it was running rich and it blew it. I corrected the mixture from my S-AFC-2 when it was in use. Have you talked to the guys at JPP yet? -JoeB

No, I have not talked to them yet. I will soon. Based on what you said, I wonder if the fact that the air/fuel sensor output being bad somehoe regulates tthe mixture. I actually have an Apexi SAFC-II to be installed, too. They did not do it yet because there was not enough proper info on the engine. I found out it was almost identical to the earlier unit, (plus knock sensor wire) so I need to have it put in after the car is fixed.