Just did an oil change myself the other day.
The next day my CEL came on.
Checked the codes today and:
P2015 (camshaft timing retarded)
as well as
P0300
P0301,2,3,4
(random multiple misfires/misfire on cylinders 1, 2, 3 and 4)
After clearing the codes, P2015 remained.
While waiting for the...