I have a 2006 Corolla LE with about 93,600 miles.
It was about 16 degrees Fahrenheit this morning and I drove on a cold start, and noticed the engine knock a bit when idling. Later noticed check engine light come on. After the car fully warmed up, 15 minutes later, the knocking seemed to subside.
I don’t think I’ve replaced the spark plugs in the longest time, so could it be this issue?