I was trouble-free for the first five years with my 2010 FFH, but in recent months the check engine light has come on three times. All three times the local dealer serviced it. First time, they replaced the vent valve. Second time they replaced the purge valve and updated the PCM. The third time (yesterday) required a call in to Ford, but finally they did a smoke test and then found a leak in an evaporation hose at the clamp. My question is, are all these just unrelated occurrences? Most important, should I expect to continue to have these problems? I admit that the car is not driven enough, just a few thousand miles a year. Could that be a factor? Thanks for any advice.