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Joined: Oct 2003
Posts: 254
aykut
Member
aykut Jun 15, 6:42pm - #199832 
2000 black Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Oct 2003
Posts: 254
maryland
Check engine problem pls help

i have a serious check engine light problem. I hope somebody can help me . Here is the story

I have 5zigen catback exhaust system on my gt, everything was fine until las month. I was driving on highway and speeding around 80 mls , then the check engine came on and went to a mechanice and he reset the ecu and said it is fine. When i use my car in the city no check engine light because i am not driving over 50 but when i speed up , it lights on . So , i went to a different mechanic and he said we have to replace the oxygen sensor and he replaced it after 2 hours , i wanted to try the car and speed up and it came on again . He told me to go the dealership but i know if i go to dealership , they will start to complain , you have aftermarket parts on ur car etc etc . The code is 171 for the check engine light , anybody has any idea what to do ? i am thinking to change the whole exhaust system but it is weird why the check engine comes on when i am speeding and it doesnot come on when driving normally ? thanks for any help
Joined: Jan 2004
Posts: 5,129
Sultan
Speed Omen
Sultan Jun 15, 6:48pm - #199833 

Speed Omen
2002 Toyota Celica GT

Joined: Jan 2004
Posts: 5,129
Philadelphia, PA
I seriously doubt it has anything to do with your exhaust... do you have a CAI?
Joined: Sep 2003
Posts: 1,261
rem
Specialist
rem Jun 15, 7:01pm - #199834 
2000 arrest me red Toyota Celica GT
Specialist
2000 Toyota Celica GT

Joined: Sep 2003
Posts: 1,261
1228 celica blvd
mine does this too..
Joined: Feb 2004
Posts: 10
stevenhom
Member
stevenhom Jun 15, 8:38pm - #199835 
2000 carbon blue Toyota Celica
Member
2000 Toyota Celica

Joined: Feb 2004
Posts: 10
bay area
try cleaning da MAF sensor thats a common problem i learned it the hard way...$110 for the dealer to tell me that the maf sensor was dirty
Joined: Oct 2003
Posts: 254
aykut
Member
aykut Jun 15, 9:16pm - #199836 
2000 black Toyota Celica GT
Member
2000 Toyota Celica GT

Joined: Oct 2003
Posts: 254
maryland
i have an AEM 2 nd gen Intake but havent installed yet and now scared to install it because it will cause problem . I get really sick and tired of that stupid check engine light codes and last attempt , will clean the maf . i hope that can solve it
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