Maintaince light comes on on 2007 Jeep Compass

At first gas light cap came on, replaced gas cap. Rhen maiantance light came on, went off came on again. Done diagnostic at auto zone. They say. evap cnister broke, hose creacked or not connected/ or purge or vent sloenniod defective/ or vacuum leak at engine. Then read somewhere it may be gas mixture like ethanol or a pre-set trigger to get jeep in for checkup or sometjhing. We have about 85,000 miles.

Asked by for the 2007 Jeep Compass
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