fuel filler cap?

SAAB
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SAAB99
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my '99 saab 9-3 has about 60,000 miles, I keep getting this message to "tighten fuel filler cap" I tried to tighten the gas cap but that's not it, what is that and where is it located.
Nov 24, 2007 at 7:55 AM
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MERLIN2021
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It is the gas cap...do you smell any gas? if not the tank pressure sensor could be bad, if you smell gas, check the filler pipe for pinholes. Also try buying a new cap, the valve on the cap may be NG!
Nov 24, 2007 at 7:58 AM