Question about 2004 Toyota Avalon

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2004 toyota avalon had check engine, VSC, and track off lights all come on. Gas cap had not been tightened properly when vehicle last fueled. Cap has now been tightened thru 2-3 clicks. Will the lights reset on their own or do I need to have reset using scan tool?

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Scan tool

Posted on Nov 17, 2009

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Yea VSC lite will come on when ever a check engine lite is On, the codes you mentioned are certainly a EVAP codes, make sure your gas cap is a factory and inspect seal surface and contac surface on filler neck for rust clean if any,also check all hoses going into air box reconect if necesary, (have your car been in any accident) if have access to a scan tool resest lite if lite comes back no other option take it to a dealer, check for warranty coverage on this systems.
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this happens because most time most people forget to tighten the Gas cap after fueling the vehicle. It is also mentioned in side the Gas cap compartment.
pls turn the Gas cap atleast three time with the clicking noise loud enough to turn head of the guy fueling by next pump.

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I just had the same issue. Cost me $40.00 to find out my gas cap wasnt clicked all the way. He also said that after the error arises, simply closing the gas until it clicked may not have removed the error code from the computer. Not sure how, but you might have to reset the computer, maybe just pull the battery?

Sean

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