SS king

my light is on i scanned it and the code was p0420 so i changed the oxygen sesor and the went away for a day but then came back on agian and i dont know what it is ....can it be my cat on the driver side ???
thanks

99SSragtop

http://gearchatter.com/viewtopic8857...188871943ab19e

Fotis

iTrader: (2)

CAUSES:
A code P0420 may mean that one or more of the following has happened:

*Leaded fuel was used where unleaded was called for
*An oxygen sensor is not reading (functioning) properly
*The engine coolant temperature sensor is not working properly
*Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
*Retarded spark timing
*The oxygen sensors in front and behind the converter are reporting too similar of readings

POSSIBLE SOLUTIONS
Some suggested steps for troubleshooting a P0420 code include:

*Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
*Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
*Inspect the downstream heated oxygen sensor (HO2), replace if necessary
*Replace the catalytic converter

***One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.

For my 2001 Camaro it needed a new CAT cost me just under $500 intstalled
so i'm almost certian thats what you need

B-Unit01WS6

I got a letter from GM stating that they would extend the warranty on cats in multiple vehicles. Might be worth looking into to save some coin.....or just take em off and put on an ORY (off road y pipe).

Fotis

iTrader: (2)

read before you post i just said that its at the bottom read for your self

Luder[PAK9]

Someone has sand in her vagina.

kw's01z28

i have a 2001 and they replaced my cats for free at the dealership and yeah the code was p0420 on my invoice it shows it as a recall

B-Unit01WS6

For real. The boards are to share information......that's what I was doing

Redneck02

good info.