OBD Check Engine Light P0420

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Old 04 Aug 2009, 08:03 pm   #1 (permalink)
c_shah
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Default OBD Check Engine Light P0420

2000 Toyota Camry 4 Cylinder - CE
About 71000 Miles

I saw check engine light on the dash copule of days ago. Took to
nearest autoparts store to check the error code. Error code was P0420
something related to catalytic converter.

To my surprise Autoparts store person reset the code and told me if it
comes again take it to the nearest muffler shop..

I drove about 30 plus miles after the reset but OBD malfunction light
had not yet came.

Does anyone knows about this error code? Only think I know catalytic
converter are very expensive my guesst $ 800-1000+ expense.
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Old 04 Aug 2009, 08:36 pm   #2 (permalink)
john
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Default Re: OBD Check Engine Light P0420

If your engine is kept in tune (NGK Iridium spark plugs, valve
clearances, timing belt, etc) and is not leaking vacuum or in the
exhaust pipe upstream of the sensors, then I'd think it's most likely
your oxygen sensors. I'd think you need to change out both of them.

If your car is NON-California spec (many other state use Calif spec),
then should be about $84+shipping for the upstream one (#13354 planar
type) http://info.rockauto.com/Bosch/Detail.html?13354.JPG

Downstream sensor is a little more expensive, about $105 for an old
thimble type sensor.

However, if you are electrically inclined to be able match wire colors
and can splice on the old connector then get the excellent Bosch
*Planar* type sensor #15733 for about $61. These work for both up and
downstream for NON-CALIF spec. These are more resistant to
contamination than old thimbles.

I know some people like Densos instead. But personally I think they're
junk and is probably what you have now.


Read the following article:
http://www.motor.com/magazine/pdfs/012009_02.pdf
http://www.boschautoparts.com/Produc...nsors/PlanarO2


On Aug 4, 6:03*pm, c_shah <shah.chi...@netzero.net> wrote:
> 2000 Toyota Camry 4 Cylinder - CE
> About 71000 Miles
>
> *I saw check engine light on the dash copule of days ago. Took to
> nearest autoparts store to check the error code. Error code was P0420
> something related to catalytic converter.
>
> To my surprise Autoparts store person reset the code and told me if it
> comes again take it to the nearest muffler shop..
>
> I drove about 30 plus miles after the reset but OBD malfunction light
> had not yet came.
>
> Does anyone knows about this error code? Only think I know catalytic
> converter are very expensive my guesst $ 800-1000+ expense.


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Old 08 Aug 2009, 08:04 am   #3 (permalink)
c_shah
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Default Re: OBD Check Engine Light P0420

The light has not yet came again after driving about 100 miles or
more. Should I bother?
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