One problem related to check engine light on has been reported for the 2011 Subaru Legacy. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Subaru Legacy based on all problems reported for the 2011 Legacy.
Vehicle was stopped at a red light. Upon light acceleration, check engine light came on (and stayed on), parking brake light began to blink, cruise control indicator began to blink, and traction control light light came on and stayed on. Driver did not detect any slippage. Authorized Subaru dealer found no problem with oil control valve (ocv) despite computer code indicating potential problem with that part. Dealer, however, indicated oil flush, rather than simply an oil change, was necessary despite less than 5,000 miles since previous oil change. Dealer asserted that oil level was not low, however. Cause of what triggered the indicators to be set off remains unclear.