PO 430 faults
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Cruising
Joined: Aug 2005
Posts: 12
Likes: 0
PO 430 faults
Hello I have a po430 fault , It is Catalyst system efficency below threshold bank 2. Is there anything i can check besides changing the catalic converter. can i drive it without any long term problems. I changed the plugs,wires. It still does 140 mph with no problems. No one seems to have herd of this condition. Thanks Gary
Burning Brakes
Joined: Jul 2000
Posts: 1,134
Likes: 1
From: Arlington Texas
P0420 and P0430 are catalytic converter efficiency trouble codes. On a car with stock exhaust these generally mean your converters are bad. This is very common on cars with long tube headers and high flow converters. These codes won't affect the way the car runs but will cause you to fail an emissions test and is a general annoyance with the MIL light on all the time.
Did you try resetting it to see if it comes back?
Did you try resetting it to see if it comes back?
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Hello I have a po430 fault , It is Catalyst system efficency below threshold bank 2. Is there anything i can check besides changing the catalic converter. can i drive it without any long term problems. I changed the plugs,wires. It still does 140 mph with no problems. No one seems to have herd of this condition. Thanks Gary
It is a p0430 not po430 (the code is "P" followed by 4 numbers .... 0430)
Try searching on that.
Second, fill out your profile so people know where you live and what year/model car you have, and mods on it. That kind of information is useful in helping you with your problem .... if you live in a metro area of Calif. you have bigger worries with a P0430 than if you live in a rural "fly over" state.
A P0430 means your catalytic converter is failing the PCM diagnostics. Could be caused by an exhaust leak, wiring problems to the rear O2 sensors, or if the cats are severely discolored, by overheating due to poor engine running conditions.
Melting Slicks
Joined: Jul 2007
Posts: 2,939
Likes: 7
From: Simpsonville SC
St. Jude Donor '09-'10
I also have the dreaded P0420 and P0430 codes. They started coming on when I had my headers and high-flow cats. My local tuner said he can turn off these annoying codes. I just need time to get them turned off!
