Buick Shows False Codes
Some owners of 2017-2018 Buick Cascada vehicles equipped with a 1.6L engine may comment that the MIL is on. DTCs P0366 and P0014 may be set. This condition may be caused by a sporadically unlocked exhaust cam phaser that can oscillate during engine start, falsely setting the DTCs.
Update the ECM to the latest calibration.