I've been taking my car to a reputable service center in town.
On Friday I started her up and had my CEL on, took her to AZ and code P0301 came up.
In April I had oxygen sensors and the valve cover gasket replaced, spark plugs and I'd imagine the wires also.
No backfiring or rough idle. I have no idea what was done before I got her 1 year ago.
Can someone point me in the direction as to why it's throwing this code?