I'm new here guys and this is my first Jag. About two weeks ago after I put gas in the car, CEL came up and, of course, "restricted performance" followed. It will go away and come back randomly, but CEL stays on. The code is P0171. Checked for leaks, cleaned MAF sensor, reset the light - everything is OK until next stop at the gas station - CEL is on again!!! Long story short - right after I put gas in a car - light comes on. I clear the code and car drives fine for 3-4 days until next refueling. I've checked the fuel cap - seems OK. Any suggestions??