One problem related to check engine light on has been reported for the 2015 Subaru Legacy. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Subaru Legacy based on all problems reported for the 2015 Legacy.
Check engine light came on with the cruise control icon flashing. The cars rpm's were repeatedly fluctuating when parked, in neutral, and in drive with the brake on.