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According to the information provided, resetting the gas cap light in the 2011 Jeep Grand Cherokee isn't feasible. A recommended initial step is to ensure the gas cap is securely tightened as corrosion might have caused a faulty seal, which could potentially be resolved using a wire brush or by replacing the cap. If these actions don't resolve the issue, there may be underlying problems with the fuel filler neck. In such cases, using an OBD-II scan tool won't clear the specific error causing the light to stay on. If the gas cap is in good condition, the light should go off after around twelve ignition cycles at most. However, if the light persists, it suggests a deeper issue within the EVAP system.
When you fill up with gas, the system will reset itself after you twist the cap four or five times. It may take a bit of time to complete the process.
To stop the gas cap indicator light on a 2011 Jeep Grand Cherokee, first unscrew and then screw the gas cap back on securely. If that doesn't solve the issue, you'll have to use an OBD-II scanner to clear the light.