service engine soon, warning light on 2004 Nissan Murano

The warning light for "service engine soon" comes on and stays on. I took off the gas cap and tightened it several times. It's been a week now..

You'll need to get the codes read out to see what caused the light to come on, otherwise it's hard to know where to start.
1 more answer
more than likely your fuel sensor...cost about 400 to repair