Cold starting issue
Starts fine when it's warm but any cold and she rough idles until warmed up. Autozone had a code for MAP sensor but dealer says there isn't one. This seems to be in conjunction with a "check gas cap" light. Any help would be appreciated.
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Testing would likely require the vehicle to be dropped off and expected to stay at least one night for the technicians to experience the symptom. By dropping it off the previous day, the tech could get a baseline on how the vehicle is performing and help preset the testing for the next morning. Testing would include measuring the fuel pressure both hot and cold. Capturing scan data information for fuel trim corrections, and the coolant and air temperature sensors for accuracy. It would be a good idea to make sure the throttle plate is clean, and the vehicle software is the latest calibration. Additional steps would be determined by what was found when baselining the vehicle and experiencing the symptom the next morning.