2004 neon check engine light


Old 04-25-10, 08:56 PM
Thread Starter
Join Date: Sep 2004
Location: Saskatchewan
Posts: 175
2004 neon check engine light

My niece brought car over to me to run a scan on it with scanner.I brought for my truck It has come in handy a couple of times with simple fix (ignition moduale on truck needed changing and it pinpointed which one was bad) On nieces car it comes up with

"Evaporation emission system leak detected(small leak)"

Can anyone point me in the right direction on this?I am totaly in the dark with this
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Old 04-26-10, 02:45 PM
Join Date: Mar 2009
Location: Texas
Posts: 1,051
If I wanted to start with the simple and easy things first, checking for a loose or faulty gas cap is where I would go first. It worked for me in the past.
Old 04-26-10, 03:04 PM
Join Date: Apr 2010
Location: USA
Posts: 1
make sure when closing the gas tank cap "cliks" at least 3 times . install scanner and erase codes. see in a few days, if check engine light comes back on, replace gas cap and erase codes again.

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