isLoTz

Any idea on what might cause this code?
I have reset it and it comes back over again for the last week or so.
Is it the O2 Sensor or the Cat Converter?


thanks in advance. : )

isLoTz

code said bank 1, so its the oxygen sensor 1 right?
What should I do to fix this CEL? Keep reseting them won't work

Legot

iTrader: (1)

Get a new catalyst, probably. They fail pretty often.

isLoTz

:-/

patriotjj

What are your symptoms?

Legot

iTrader: (1)

Well there's the cel...

Megarath

I have the same P0420 code as well the car was running fine then all of a sudden the car started running rich and the CEL came on there is a strong smell of gas fumes when you walk around the car and coming into the cabin when at a stop light. Everyone I have talked to about it including the dealer is telling me to change the cat on it, but who makes a decent cat that will last a bit longer?

Legot

iTrader: (1)

One of your coils probably failed. A failed cat won't cause you to run rich, but running rich (due to improper burning, due to ignition failure) will cause a cat to fail.

Replace your ignition (coils, plugs, and wires) then either do a decat or get an OEM replacement from somewhere.

Blackonblack8

I had the same code come up after I installed a new cat and rear o2 sensor. I replaced the upstream o2 sensor and it solve the problem. Hope this helps.

deuc3s

I recently just got the same code when to get it check and now I'm freaking out since cats are like 1200 dollars could I use an after market one instead of a stock I hope some one can help

Legot

iTrader: (1)

Just don't use one. It's free.

deuc3s

haha thought about it but i sadly have to pass the emission to get plates

BigCajun

iTrader: (1)

I'm not sure how strict your laws are, I'm in Missouri.
My cat was dead at less than 20k because of misfires.
I replaced it with a BHR midpipe, and bought a Walker direct fit cat for less than $200 that I installed just for inspection, and took it off after.
I got a 2 year sticker, so it's not a big deal for me.