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Joined: Jul 2004
Posts: 62
RedCelly00
Member
RedCelly00 Oct 11, 3:50pm - #297455 

Member
2000 Toyota Celica GT

Joined: Jul 2004
Posts: 62
Orlando
P0420 code

I got this code on my CEL. Sometimes it goes off by itself but i think the sensor is finally dead. It says its the cat sensor. Can anyone give me an idea as to how uch it is and whether or not I can replace it myself?

"Have you ever noticed that anybody going slower than you is an idiot, and anyone going faster than you is a maniac?"
George Carlin
Joined: Jun 2004
Posts: 1,376
QTRMLR_1
Specialist
QTRMLR_1 Oct 11, 7:13pm - #297456 

Specialist
2002 Toyota Celica

Joined: Jun 2004
Posts: 1,376
Los Angeles, CA
I checked and: It could be an exhaust system leak, a malfunctioning 02 sensor, bad wiring to an 02 sensor, or a bad catalytic converter.

Get under your car and check for possible exhaust leaks.
Check your wires under your car that run between the underbody and the O2 sensors.
Just like we spray the MAF with Disc Brake Cleaner, Carburetor/Throttle Body Cleaner (even though we don't have a carburetor) etc, you can try spraying the O2 sensors(but make sure you won't harm the sensors with the spray chemical), but first consider:
How many miles do you have on your '00 Celica? And is that the original stock CAT on the car (assuming of course that you are the original owner of the car and not another person who used an aftermarket and put the stock back on and then sold it!). Hey, I just think of as many possibilities as I can 'cause I can't help it.

I get my kicks on EC.
Joined: Jul 2004
Posts: 62
RedCelly00
Member
RedCelly00 Oct 11, 8:54pm - #297457 

Member
2000 Toyota Celica GT

Joined: Jul 2004
Posts: 62
Orlando
Yea my celly has 130k on it and is the original so it would make sense that something would start to fail me. I'll check under my car and see what's what.

"Have you ever noticed that anybody going slower than you is an idiot, and anyone going faster than you is a maniac?"
George Carlin
Joined: Mar 2004
Posts: 1
bluecelicagirl00
New Member
bluecelicagirl00 Oct 18, 2:48am - #297458 

New Member
2000 Toyota Celica

Joined: Mar 2004
Posts: 1
Orlando, Florida
Hey! My car is coming up with the same code. Can you tell me how hard it's going to be to replace the sensor? [email]Roxygirl818@hotmail.com.[/email] Thanks!
Joined: Jun 2004
Posts: 1,376
QTRMLR_1
Specialist
QTRMLR_1 Oct 18, 4:49am - #297459 

Specialist
2002 Toyota Celica

Joined: Jun 2004
Posts: 1,376
Los Angeles, CA
hi bluecelicagirl00, it could be your cat gone bad(catalytic converter). How many miles do you have on your car?

I get my kicks on EC.
Joined: May 2002
Posts: 6,007
isaac
ECelica Admin
isaac Oct 18, 3:58pm - #297460 
2001 Absolutely Red Toyota Celica GT
ECelica Admin
2001 Toyota Celica GT

Joined: May 2002
Posts: 6,007
Los Angeles, CA
Toyota warranties the emissions system to 8 years or 80,000 miles...

bring it in for inspection when you get your next oil change done AT a TOYOTA service center thumbsup

[Linked Image]
It's not just your imagination...
Your day really does go by twice as fast while on EverythingCelica.com
Joined: Oct 2004
Posts: 9
spddemon
New Member
spddemon Oct 27, 2:48am - #297461 
2000 black Toyota Celica GT
New Member
2000 Toyota Celica GT

Joined: Oct 2004
Posts: 9
oklahoma
I had the same code come up on my celica, I needed a new o2 sensor and a new catalytic converter... an o2 sensor in $100. and can be replaced yourself
Joined: Jul 2004
Posts: 62
RedCelly00
Member
RedCelly00 Nov 3, 6:43pm - #297462 

Member
2000 Toyota Celica GT

Joined: Jul 2004
Posts: 62
Orlando
yea i have 133k miles

"Have you ever noticed that anybody going slower than you is an idiot, and anyone going faster than you is a maniac?"
George Carlin
Joined: Dec 2004
Posts: 9
lambogt
New Member
lambogt Dec 14, 5:48pm - #297463 
2003 blue Toyota Celica GT
New Member
2003 Toyota Celica GT

Joined: Dec 2004
Posts: 9
virginia beach, va
ghjethegh
1953384721-phil2.jpg
Joined: Jun 2004
Posts: 1,376
QTRMLR_1
Specialist
QTRMLR_1 Dec 15, 1:47am - #297464 

Specialist
2002 Toyota Celica

Joined: Jun 2004
Posts: 1,376
Los Angeles, CA
^^ now that's post whoring to the extreme. don't start, and you won't have to stop. Just say NO!

I get my kicks on EC.
Joined: Sep 2004
Posts: 60
Toyotapartsdude
Member
Toyotapartsdude Dec 15, 12:52pm - #297465 
2002 black Toyota Celica
Member
2002 Toyota Celica

Joined: Sep 2004
Posts: 60
Ann Arbor, Mi
hes over 80k , thier not going to warranty it
and if it is a catalytic converter theres no way hes gonna get out of there for $100.
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