Should I worry

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Dec 31, 2010 | 03:49 PM

XJUSMC

Thread Starter

Senior Member

Joined: Dec 2010

Posts: 888

Likes: 2

From: Wekiva, FL

Year: 99 sport

Model: Cherokee

Engine: 4.0 i6

Should I worry

Pulled this code today.

P0420 (M) 1/1 Catalytic Converter Efficiency Catalyst 1/1 efficiency below required level.

and besides destroying the ozone should i worry about it or erase it.

thanks.

Dec 31, 2010 | 03:52 PM

96_xj

Honorary Moderator

Joined: Mar 2010

Posts: 8,135

Likes: 16

From: Gilbert AZ/Las Cruces NM

Year: 1996

Model: Cherokee

Engine: 4.0 upgraded

it wont erase, it will come back. all that means is you need a new cat. and you wont pass emissions. look in our vendor area they sell a VERY nice cat for a good price

Dec 31, 2010 | 04:06 PM

odgreen

CF Veteran

Joined: Nov 2010

Posts: 15,581

Likes: 8

From: some small town oregon

Year: 1989

Model: Cherokee

Engine: 4.0

or run prem gas and clear it.. it worked on my zj

Dec 31, 2010 | 04:09 PM

JeepingDan

CF Veteran

Joined: Apr 2009

Posts: 18,786

Likes: 14

From: CT.

Year: 88

Model: Comanche (MJ)

Engine: 4.0 HO

X2 that usually means the cat is no good. Just replace it and you should be good to go.

But before I condemn the cat I aways check for exaust leaks around it first. That can also throw a code.