P0420 - Problem
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P0420 - Problem
Hello all,
My 00 is throwing code p0420
Freeze Frame Data
Fuel Sys 1 CL
Fuel Sys 2 CL - Fault
Calc Load(%) 64.31
ECT(*F) 179
STFT B1(%) -2.34
Can someone please explain what this means?
Also what mite cause the Fuel sys2 fault?
THANK YOU ! ! !
My 00 is throwing code p0420
Freeze Frame Data
Fuel Sys 1 CL
Fuel Sys 2 CL - Fault
Calc Load(%) 64.31
ECT(*F) 179
STFT B1(%) -2.34
Can someone please explain what this means?
Also what mite cause the Fuel sys2 fault?
THANK YOU ! ! !
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
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From: Midwest. Aiming about mid-chest
Rep Power: 518 
Re: P0420 - Problem
If there are no exhaust leaks (cracked manifold?) between the engine and the cat, then it most likely needs a cat.
It needs a GOOD cat.
And you need to determine why this cat went bad, and correct it if possible or necessary.
This came up in a bulletin search http://www.tegger.com/hondafaq/p0420/A05-027.pdf
There is no FS2, there is no bank 2. Therefore, the reader says "fault". It means nothing.
EDIT: HOLD UP! Is this on the engine you are asking about 3 stage VTEC?
It needs a GOOD cat.
And you need to determine why this cat went bad, and correct it if possible or necessary.
This came up in a bulletin search http://www.tegger.com/hondafaq/p0420/A05-027.pdf
There is no FS2, there is no bank 2. Therefore, the reader says "fault". It means nothing.
EDIT: HOLD UP! Is this on the engine you are asking about 3 stage VTEC?
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Yes it is, sorry forgot to put that on this one.
Its a D15 With a Vtec head and 3 stage vtec
I had alot of idle/misfire problems, ended up being a bad intake gasket. That probably caused the cat to go bad
if its just the cat ill run it without one.
Not a street driven car
Its a D15 With a Vtec head and 3 stage vtec
I had alot of idle/misfire problems, ended up being a bad intake gasket. That probably caused the cat to go bad
if its just the cat ill run it without one.
Not a street driven car
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 518 
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 518 Re: P0420 - Problem
maybe a bad 02?
I'm sure there could be an occasional false cat code out there, but that is rare on Hondas IMO. I have found cat fail codes to be pretty reliable in general on Hondas.
If the other stuff I mentioned is ok (exhaust leaks), and the computer has good fuel control, then......
Sometimes we just have to trust the computer.
If the engine has been run with misfires and/or poor control of fuel, running far too rich, etc., chances are good the cat is bad. A cat can be ruined in only a matter of minutes under the right (wrong?) conditions.
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