Got the CEL with a P0172 code a week ago. "Fuel trim malfunction (A/F too rich)". Cleared and so far it hasn't come back. At this point, what is better:
- Not bother with anything until it comes back again?
- Start checking and investigating?
There doesn't seem to be anything wrong with the car. Maybe, just maybe, a little rough idling thouhg. Is it, by any chance, a common code that tends to be triggered by one particular component on Subarus?
DK