2000 Toyota Echo failed emissions

2000 TOYOTA ECHO
150,000 MILES • 4 CYL • FWD • MANUAL
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TRAVIS238
  • MEMBER
  • 1 POST
well when u try to pull out in traffic the car seems to hesataite and not wanna get up to speed. then also the check engine light came on and i pulled the code up and got po171(system to lean bank 1) and im not 2 sure where to look at. i have also changed the plugs and coils in the car and it still does it.i thought it was the catalyic converter was clogged. but i took a crayon from the header back to the muffle and all the crayon was melted so i figured it was getting exhust flow. now im thinkingits an o2 sensor problem or a fuel am i on the right track or what do u think could be the promblem???
Jul 7, 2008 at 4:25 PM
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KHLOW2008
  • ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Hi TRAVIS238,

Could be the O2 sensor is faulty but before going further, check for vacumn leakages at throttle air intake area.
Jul 8, 2008 at 3:34 PM
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