Check Engine Light Due to Gas Cap Issue on Saturn LW300

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

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Average mileage: 158,750 (48,000–271,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
9 people reported this problem
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problem details
2002 Saturn LW300 198,000 mi,
Check engine light was on, so I took it to Auto Zone for a code check and they told me I needed a new gas cap. I couldn't believe it, but after getting a new gas cap ($10) the problem went away.
I changed the gas cap and the service light and now the check engine lights are on.
2004 Saturn LW300 118,000 mi,
Engine light on, checked gas cap & it was loose. Tightened it. Light still on. Will try a new cap.
2004 Saturn LW300 48,000 mi,
Check engine light - OBDII stated leak in fuel evap system - new gas cap fixed the problem