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Joined: Feb 2004
Posts: 965
morris
BerraquĆ­sima!
morris Nov 7, 11:29pm - #320002 
2000 White Toyota Celica GT
BerraquĆ­sima!
2000 Toyota Celica GT

Joined: Feb 2004
Posts: 965
Orange County, CA
Check Enginne light!

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://www.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: 2,979
RookieGTS
Boobie Vision
RookieGTS Nov 7, 11:33pm - #320003 

Boobie Vision
2000 Toyota Celica

Joined: May 2004
Posts: 2,979
925 Nor Cal
beats me bro confused
Joined: Jun 2004
Posts: 1,376
QTRMLR_1
Specialist
QTRMLR_1 Nov 8, 1:42am - #320004 

Specialist
2002 Toyota Celica

Joined: Jun 2004
Posts: 1,376
Los Angeles, CA

I get my kicks on EC.
Joined: Oct 2004
Posts: 22
benker
Member
benker Nov 8, 1:45am - #320005 
2000 Absolutely Red Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Oct 2004
Posts: 22
California
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
Heat
Member
Heat Nov 8, 1:51am - #320006 
2003 Spectra Mica Blue Toyota Celica
Member
2003 Toyota Celica

Joined: Aug 2003
Posts: 371
near Philly, PA
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: 4,278
Virgilson
TheFilipinoCrew
Virgilson Nov 8, 8:18pm - #320007 

TheFilipinoCrew
2000 Toyota Celica GT

Joined: Aug 2003
Posts: 4,278
Pomona, CA
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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