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  #1 (permalink)  
Old 24 Feb 2004, 03:46 am
Fletcher
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Default Check Engine P0420

I have a 1999 Acura 3.2 TL with ~75000 miles. today the check engine light
came on and according to AutoZone it is a code

P0420 *Catalyst system efficiency below threshold (Bank 1)*

So how do I got about fixing this one. Seems to be a broad error. Bad
Converter? Bad O2 sensor? Bad ignition? Bad fuel? Exhaust leak? What should
I look for first? How do I reset the computer / ECM on an Acura so I can
tell if what I change fixes the problem? Will a battery disconnect clean
the code?



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  #2 (permalink)  
Old 24 Feb 2004, 11:21 pm
Ryan
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Default Re: Check Engine P0420

My roomates car threw this code also. My dad cleared it with an engine
management tool but you should be able to disconnect the battery lead for a
minute or two. I believe it is a bad O2 sensor. Call Acura's Service
department and they will tell you for sure.


"Fletcher" <no@mail.com> wrote in message
news:FaE_b.22$vk7.14@fe04.usenetserver.com...
> I have a 1999 Acura 3.2 TL with ~75000 miles. today the check engine

light
> came on and according to AutoZone it is a code
>
> P0420 *Catalyst system efficiency below threshold (Bank 1)*
>
> So how do I got about fixing this one. Seems to be a broad error. Bad
> Converter? Bad O2 sensor? Bad ignition? Bad fuel? Exhaust leak? What

should
> I look for first? How do I reset the computer / ECM on an Acura so I can
> tell if what I change fixes the problem? Will a battery disconnect clean
> the code?
>
>
>



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  #3 (permalink)  
Old 01 Mar 2004, 07:39 pm
unix-freak
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Posts: n/a
Default Re: Check Engine P0420

The PO420 is a catalyst effenciency code. It could very well be a bad
catalytic convertor on bank 1.

Before assuming it's a bad o2 sensor, make sure to test them first.

"Fletcher" <no@mail.com> wrote in message
news:FaE_b.22$vk7.14@fe04.usenetserver.com...
> I have a 1999 Acura 3.2 TL with ~75000 miles. today the check engine

light
> came on and according to AutoZone it is a code
>
> P0420 *Catalyst system efficiency below threshold (Bank 1)*
>
> So how do I got about fixing this one. Seems to be a broad error. Bad
> Converter? Bad O2 sensor? Bad ignition? Bad fuel? Exhaust leak? What

should
> I look for first? How do I reset the computer / ECM on an Acura so I can
> tell if what I change fixes the problem? Will a battery disconnect clean
> the code?
>
>
>



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  #4 (permalink)  
Old 02 Mar 2004, 12:30 am
Barry S.
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Posts: n/a
Default Re: Check Engine P0420

On Mon, 1 Mar 2004 19:39:30 -0500, "unix-freak"
<mandrakemaniac@yahoo.com> wrote:

>The PO420 is a catalyst effenciency code. It could very well be a bad
>catalytic convertor on bank 1.
>
>Before assuming it's a bad o2 sensor, make sure to test them first.
>
>"Fletcher" <no@mail.com> wrote in message
>news:FaE_b.22$vk7.14@fe04.usenetserver.com...
>> I have a 1999 Acura 3.2 TL with ~75000 miles. today the check engine

>light
>> came on and according to AutoZone it is a code
>>
>> P0420 *Catalyst system efficiency below threshold (Bank 1)*
>>
>> So how do I got about fixing this one. Seems to be a broad error. Bad
>> Converter? Bad O2 sensor? Bad ignition? Bad fuel? Exhaust leak? What

>should
>> I look for first? How do I reset the computer / ECM on an Acura so I can
>> tell if what I change fixes the problem? Will a battery disconnect clean
>> the code?


I would advise you to take it to a mechanic. You're simply not going
to have the diagnostic equipment to accurately diagnose/fix it at
home. You will want to rule out the engine, ignition system/timing,
the O2 sensors, any electrical problems, and verify the cat is indeed
bad and if it is, why did it fail? (You'll want to have access to an
oscilloscope, maybe a 5 gas analyzer, OBD-II scanner capable of live
data, infrared thermometers, a lift is helpful as is a well stocked
toolbox.)

Swapping parts on Acuras gets very expensive, expecially if they
aren't the right ones.

Also, there MAY be an extended emissions warranty on your car. Ask
the dealer.

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  #5 (permalink)  
Old 02 Mar 2004, 03:38 am
Fletcher
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Posts: n/a
Default Re: Check Engine P0420

I was hoping for a more technical board, is there a better place to go for
info on a 3.2 tl? But I did figure out the problem, seems to be bad fuel.
I used a different station, went to the highest grade I could find, drove it
for a week, reset the computer and all is well.

"Fletcher" <no@mail.com> wrote in message
news:FaE_b.22$vk7.14@fe04.usenetserver.com...
> I have a 1999 Acura 3.2 TL with ~75000 miles. today the check engine

light
> came on and according to AutoZone it is a code
>
> P0420 *Catalyst system efficiency below threshold (Bank 1)*
>
> So how do I got about fixing this one. Seems to be a broad error. Bad
> Converter? Bad O2 sensor? Bad ignition? Bad fuel? Exhaust leak? What

should
> I look for first? How do I reset the computer / ECM on an Acura so I can
> tell if what I change fixes the problem? Will a battery disconnect clean
> the code?
>
>
>




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  #6 (permalink)  
Old 04 Mar 2004, 03:26 am
Ryan
Guest
 
Posts: n/a
Default Re: Check Engine P0420

If you find a more technical board please let me know. Seriously. People
here are very opiniated and most of the time don't answer anyone's
questions.


"Fletcher" <no@mail.com> wrote in message
news:2AA1c.28$Kt.1@fe26.usenetserver.com...
> I was hoping for a more technical board, is there a better place to go for
> info on a 3.2 tl? But I did figure out the problem, seems to be bad fuel.
> I used a different station, went to the highest grade I could find, drove

it
> for a week, reset the computer and all is well.
>
> "Fletcher" <no@mail.com> wrote in message
> news:FaE_b.22$vk7.14@fe04.usenetserver.com...
> > I have a 1999 Acura 3.2 TL with ~75000 miles. today the check engine

> light
> > came on and according to AutoZone it is a code
> >
> > P0420 *Catalyst system efficiency below threshold (Bank 1)*
> >
> > So how do I got about fixing this one. Seems to be a broad error. Bad
> > Converter? Bad O2 sensor? Bad ignition? Bad fuel? Exhaust leak? What

> should
> > I look for first? How do I reset the computer / ECM on an Acura so I

can
> > tell if what I change fixes the problem? Will a battery disconnect

clean
> > the code?
> >
> >
> >

>
>
>



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