I have a Kohler 26 HP EFI in my Walker 48" GHS. Yesterday i was finishing up cutting one of uor larger accounts and noticed that i wasnt getting enough power in some areas, where ive had FULL power a weekago. It bogged down when i hit some higher grass thinking it was the blades that needed to be changed. Well i finished and parked it. Went and trimmed the lawn and came back blew everthing off and went to start it and put it on the trailer, I noticed that the Service Engine Light had come on and would go off about 3 or 4 seconds later. Today i went and did the "self test" by turning the ignition to the run position (3 times) and then let the light flash, it flashed for me 4-2 which is 42. If i could get any insight on this problem that would be fantastic! And should i just take it to my local Kohler Certified Dealer? Not too sure if i have to take it to a "Walker dealer".