engine running at reduced efficiency message

[duckdive]

That is what ended up doing the trick for me. I had all the symptoms you have now, but since they changed the sensor for my coolant I have not had any problems since. So you may be out of the woods on this one.

 

[newbiebob]

Interesting info and thanks. When I took it in the last time I noted that the problem was prevalent during very hot weather. Turned out that they replaced the coolant sensor and it's been fine!

Thanks again,

Bob