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Joined: Jun 2003
Posts: 141
CeliCaRM2001
Member
CeliCaRM2001
2001 silver Toyota Celica GT
Member
2001 Toyota Celica GT

Joined: Jun 2003
Posts: 141
Mass
Sep 21, 12:52am - #280810 
getting gas and check engine light

I have a problem with my 2001 gt. almost everytime i get gas my check engine light comes on after i drive my car for a while or a few small trips and then it goes off after a couple trips. has this happened to anybody else? The engine is stock so its not like i changed anything that would make this happen. any ideas would be helpful

Joined: Oct 2003
Posts: 1,549
JBing
Pizza Geek
JBing

Pizza Geek
2002 Toyota Celica GT

Joined: Oct 2003
Posts: 1,549
Detroit
Sep 21, 1:20am - #280811 
are you turning the gas cap till it clicks?


FS: 19" ADR M Sports
Joined: Jun 2003
Posts: 141
CeliCaRM2001
Member
CeliCaRM2001
2001 silver Toyota Celica GT
Member
2001 Toyota Celica GT

Joined: Jun 2003
Posts: 141
Mass
Sep 21, 1:36am - #280812 
Originally Posted by JBing
are you turning the gas cap till it clicks?

yes but it still happens anyway

Joined: Oct 2003
Posts: 1,549
JBing
Pizza Geek
JBing

Pizza Geek
2002 Toyota Celica GT

Joined: Oct 2003
Posts: 1,549
Detroit
Sep 21, 1:50am - #280813 
maybe theres a bad seal or a loose fill hose or something cause its a pressurized gas tank and the manual says that if the gas cap isnt clicked that the CEL will come on. Id take it to the dealer


FS: 19" ADR M Sports
Joined: Sep 2002
Posts: 233
devilinacelica
Member
devilinacelica
2000 Black Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Sep 2002
Posts: 233
Nj
Sep 21, 6:21am - #280814 
try getting a new gas cap...they dont cost much. My friend has an is300 and she was having the same problem...took it to the dealer and all they did was replace the cap and shes fine now.


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Joined: Sep 2004
Posts: 896
celicajonz
Senior Member
celicajonz
Senior Member
2004 Toyota Celica

Joined: Sep 2004
Posts: 896
*562* , CA
Sep 21, 7:52am - #280815 
yeah its prob having an evap leak cause the gas cap isn't sealing right when you close the cap...try gas cap, worse case it might be fuel line down to the tank and it might be loose r something...


Originally posted by A_Bathing_Ape:
I hit, what else, oh plus dome.
Joined: Jul 2004
Posts: 2,016
Haulin_A_Doo
Specialist
Haulin_A_Doo
Specialist

Joined: Jul 2004
Posts: 2,016
Ontario
Sep 21, 9:57am - #280816 
Make sure your code relates to the fuel tank. Take it to Toyo & get the code read.

Joined: Jun 2003
Posts: 141
CeliCaRM2001
Member
CeliCaRM2001
2001 silver Toyota Celica GT
Member
2001 Toyota Celica GT

Joined: Jun 2003
Posts: 141
Mass
Sep 30, 1:02am - #280817 
i bought a carchip and my code is p0420. I just dont understand why the cel comes on and goes off by itself.

Joined: Jun 2002
Posts: 820
GOLDCELICA
Senior Member
GOLDCELICA

Senior Member

Joined: Jun 2002
Posts: 820
San Diego
Sep 30, 1:12am - #280818 
Originally Posted by CeliCaRM2001

i bought a carchip and my code is p0420. I just dont understand why the cel comes on and goes off by itself.


PO420 Catalyst System Efficiency Below Threshold (Bank1)
- Gas Leakage on exhaust system
- Open or short in heated oxygen sensor circuit
- Heated oxygen sensor
- Three-way catalytic converter

Click Here for engine trouble code


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