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2004 Toyota Corolla Check engine light is on

Tiny
OPI
  • MEMBER
  • 2004 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 50,000 MILES
Hi, my "check engine" light came on suddenly yesterday. When this happened before, they said I didn't tighten the gas cap all the way. How can I test this, to see if it corrects the problem? Can I just unscrew and tighten the gas cap now, or do I have to put more gas in and drive it for a while? Thank you.
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Wednesday, January 6th, 2010 AT 12:51 PM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Just tighten gas cap and check engine light will go off in a day or two.

You can take to some autoparts stores and have code erased.
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Friday, January 8th, 2010 AT 8:05 AM
Tiny
OPI
  • MEMBER
  • 2 POSTS
Thank you so much for your reply!
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Friday, January 8th, 2010 AT 1:45 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
If gas cap is problem, you will get an EVAP (small leak) error, it will go away after a while once cap is tightened.
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Saturday, January 9th, 2010 AT 7:22 AM

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