Engine warning light on, moderate driving allowed
New to the forum. Have a problem which despite loads of research I'm not quite sure of next action.
Have a 62 plate Countryman Cooper S, 52k miles. On Saturday, doing about 75mph on dual carriageway and I felt the car hesitate under moderate acceleration... not a misfire, no smoke or theatrics, just a lag in the power.
Then the yellow engine light comes on and we're in limp mode.
Got home, turned engine off, restarted, car went OK despite engine light still on.
Left the car for a few days drove it today, hardish down the local motorway and happened again.
Car does a lot of short journeys.
Battery fine (checked)
Any ideas of course to take ? Likely a plug in and diagnosis ?
What could it be ?