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Very common issue with saturn and emissions testing/state inspections, I see it all the time. The engine needs to meet certain criteria in order to be "ready" to pass the emissions test. One of the criteria is that the engine must maintain operating temperature throughout the drive cycle. The thermostat and coolant temperature sensor are known failures on these vehicles. The thermostat sticks open slightly..just enough to prevent the engine from reaching full operating temperature, but causes no driveability issues. Replace the thermostat and coolant sensor, drive the car for about 40 miles and you should be good to go.
This agrees with our mechanics observation of the engine running cool, although he was not aware of temp causing this issue.
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