Not a big job to adjust as per manual.
How is your oil level, and when was it changed? when you do lots of short trips the oil level can rise, cos fuel gets past the rings into the oil, and doesn't evaporate because the oil doesn't get hot enough (water temp. isn't oil temp) resulting in thin oil that smells of gas when you change it. I don't know if this would cause your problem, but I'm sure it wouldn't help:O
How is your oil level, and when was it changed? when you do lots of short trips the oil level can rise, cos fuel gets past the rings into the oil, and doesn't evaporate because the oil doesn't get hot enough (water temp. isn't oil temp) resulting in thin oil that smells of gas when you change it. I don't know if this would cause your problem, but I'm sure it wouldn't help:O