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Joined: Nov 2002
Posts: 198
Member
2000 Toyota Celica
Member
2000 Toyota Celica
Joined: Nov 2002
Posts: 198
well I went to autozone and borrowed the device to pull the code for the CEL light that I got and this is what it said:

P0420 Catalyst Efficiency Below Threshold (Bank 1)

1. catalytic converter defective
2. engine misfire or running condition
3. large vacuum leak
4. engine oil leakage into exhaust valve guide seals piston rings
5. refer to AZ commercial preferred customer

What'd you guys think the problem might be? The guy at Autozone said the O2 sensor might have been knocked out or something. Thanks

Joined: Jun 2003
Posts: 216
!!!!
2003 Toyota Celica GT
!!!!
2003 Toyota Celica GT
Joined: Jun 2003
Posts: 216
I have the same code right now...popped up right after having it inspected (emissions too). cry

Joined: Apr 2004
Posts: 427
Senior Member
2000 Toyota Celica
Senior Member
2000 Toyota Celica
Joined: Apr 2004
Posts: 427
Damn, that's sounds bad! Guess you'll be heading to the dealer!

Joined: Nov 2002
Posts: 198
Member
2000 Toyota Celica
Member
2000 Toyota Celica
Joined: Nov 2002
Posts: 198
aw man...u serious? I hope it's nothing too big. I don't wanna spend hella money fixing my car again f*ck..

Joined: Aug 2003
Posts: 4,265
TheFilipinoCrew
2000 Toyota Celica GT
TheFilipinoCrew
2000 Toyota Celica GT
Joined: Aug 2003
Posts: 4,265
damn...your soo lucky..the AutoZone like a few houses down from me doesn't even let me use the damn CEL Reader...

Joined: Dec 2004
Posts: 218
Member
2000 Toyota Celica
Member
2000 Toyota Celica
Joined: Dec 2004
Posts: 218
i know what that is i just got mine fix its your cat. if your car has under 80,000 the toyota has to fix it for free because the cat. in the celica are gov. cover untill 80,000 i got mine fix at 79,000 miles

Joined: Feb 2004
Posts: 963
Likes: 1
Berraquísima!
2000 Toyota Celica GT
Berraquísima!
2000 Toyota Celica GT
Joined: Feb 2004
Posts: 963
Likes: 1
I got the same last october...
but my light comes and goes by itself... sometimes within a few miles, others, withing hundreds. I'll take my car for diagnosis (besides: brake recall, oil change- they're so nice a my toyota dealer- and other minor maintenance... ) and see what happend... I think the problem is the O sensor...

Joined: Nov 2002
Posts: 1,073
Specialist
2001 Toyota Celica GT
Specialist
2001 Toyota Celica GT
Joined: Nov 2002
Posts: 1,073
It is one of the following--
1). Bad cat
2). Bad O2 sensor
3). bad pcv valve
4). dirty cone filter (do you have Injen SRI ?) Recharge your filter
5). A large vacuum leak somewhere.

The cat is warrantied to 80K

Joined: Sep 2002
Posts: 91
Member
Member
Joined: Sep 2002
Posts: 91
Had the same code a month ago. Dealer gave me a new cat under the 80K/8yr warranty. thumbsup

Joined: Oct 2003
Posts: 55
Member
2000 Toyota Celica GT
Member
2000 Toyota Celica GT
Joined: Oct 2003
Posts: 55
I HAVE THE SAME CODE HAPPENING TO ME ALSO, SO IT IS THE CAT CAUSING THE PROBLEM?

Joined: Oct 2003
Posts: 55
Member
2000 Toyota Celica GT
Member
2000 Toyota Celica GT
Joined: Oct 2003
Posts: 55
BUT IM ALSO GETTING A CODE THAT SAYS BANK ONE SYSTEM TOO RICH, BUT I HAVE TRIED USING ALL DIFFERENT TYPES OF FUELS AND NOTHING HELPS.

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Aerowilson182
Aerowilson182
2001 Toyota Celica GT
Auburn, AL

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