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#320002 Nov 7, 4:29pm
Joined: Feb 2004
Posts: 963
Likes: 1
Berraquísima!
2000 Toyota Celica GT
Berraquísima!
2000 Toyota Celica GT
Joined: Feb 2004
Posts: 963
Likes: 1
has been acting weird. It comes on, then off, then on... rolleyes

I got the code pulled @ Autozone: P0420

This is what I found here https://celicahobby.com/ubbthreads/thread.f_1870112628_0_collapsed_2__1.html
CEL - Diagnostic Trouble Code Chart

DTC No. : P0420
Detection Item:
Catalist System efficency below threshold (bank 1)
Trouble area :
- gas leak in exhaust system
- open or short in heated oxygen sensor circuit
- Heated oxygen sensor
- threeway catalyctic converter

confused Is this a serious problem? what should I check first?

Joined: May 2004
Posts: 2,971
Boobie Vision
2000 Toyota Celica
Boobie Vision
2000 Toyota Celica
Joined: May 2004
Posts: 2,971
beats me bro confused

Joined: Jun 2004
Posts: 1,374
Likes: 1
Specialist
2002 Toyota Celica
Specialist
2002 Toyota Celica
Joined: Jun 2004
Posts: 1,374
Likes: 1


I get my kicks on EC.

Joined: Oct 2004
Posts: 22
Member
2000 Toyota Celica GT
Member
2000 Toyota Celica GT
Joined: Oct 2004
Posts: 22
dude you should try to check the cat o2 sensor i had that problem a while ago. is your making any noise?

Joined: Aug 2003
Posts: 371
Member
2003 Toyota Celica
Member
2003 Toyota Celica
Joined: Aug 2003
Posts: 371
Isaac just had that problem. Toyota replaced everything under warrenty, because of some laws in Cali. Go to Toyota and have them check it out. thumbsup

I think the problem was the rear O2 sensor on the exhaust after the cat. But I don't remember, anyway, check with a dealer.


[Linked Image]

Joined: Aug 2003
Posts: 4,265
TheFilipinoCrew
2000 Toyota Celica GT
TheFilipinoCrew
2000 Toyota Celica GT
Joined: Aug 2003
Posts: 4,265
Originally Posted by Heat
Isaac just had that problem. Toyota replaced everything under warrenty, because of some laws in Cali. Go to Toyota and have them check it out. thumbsup

I think the problem was the rear O2 sensor on the exhaust after the cat. But I don't remember, anyway, check with a dealer.


haha heather that avatar of your is hilarious...


oh btw...Morris is a girl...for those who didn't know. rofl

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toysport_celica
toysport_celica
2000 Toyota Celica
Ca

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