Questions tagged [p0430]

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1answer
12k views

How to determine if P0430 is O2 or catalytic converter

2009 CTS4 3.6L P0430 catalyst below efficiency bank 2 comes on periodically. (There are no other codes being thrown.) I put a data logger on it today on my drive to work and the rear sensor is ...
3
votes
2answers
203 views

Is my catalytic converter bad?

I have a 2006 Lexus LX 470 and I’m getting the check engine light on. I have a reader and I am seeing P0430 “ catalyst efficiency below normal (bank 2). I took some data from the sensors and plotted ...
3
votes
0answers
154 views

Nagging P0430 (and now a pending P0420 too!) 2004 Lexus ES330

I've got a 2004 ES330 (2nd owner) with roughly 315,000. We didn't pay much for the car in 2012 with 164,000 miles. So, i've never gone overboard in maintenance of it. A year ago, when it was time for ...
1
vote
1answer
272 views

OBDII Codes P0304 and P0430

On a 2005 Lexus RX330: P0304 Cylinder #4 misfire. What is the cause and is it a big job to fix? P0430 Catalyst system efficiency below threshold - Bank 2. Is this a big job? Is it OK to run the ...
1
vote
1answer
835 views

Hundai P0430 DTC

On a 2005 Hyundai Santa Fe, I have a P0430 code. The description is "Catalytic converter below efficiency, bank 2". How many O2 sensors are there and where are they? Also which one(s) could contribute ...
1
vote
2answers
2k views

P0430 (Catalyst System Efficiency Below Threshold) Toyota Camry 2005 V6

I have a 2005 Toyota Camry V6. The check engine light was on for while and I cleared it once using an OBD2 reader. It didn't come up for while. I used the .87 petrol and I thought that is what ...