2003 Cadillac CTS
6 Cyl. Got code p0306, and p0300. Engine
running rough of course. Later running rough and got same codes plus one for "crank shaft position sensor". Replaced Crank Shaft position sensor, reset computer ran fine with no misses. Next start up got p0306 again and p0300. Also got C112B of which I can't find any definition for. Pulled coil packs and found oil in plug cavity of Cylinder 6. Assumed oil was causing short. Replaced valve cover gaskets on both sides, installed new plugs. Reset computer, car ran fine then got p0300, and p0305, misfire cylinder 5. Stopped car, re started and ran smooth with no misfires but I'm assuming the next drive will indicate misfires in cyl 5
JA: Does the vehicle stall at low speeds? Does it sputter?
Customer: Doesn't stall but sputters, misses
JA: What is the make/model of your car?
Customer: 2003 Cadillac CTS 6 cyl
JA: Are you fixing your CTS yourself? What have you tried so far?
Customer: replaced crank shaft position sensor. replace valve cover gaskets and plugs on both sides
JA: Anything else you want the mechanic to know before I connect you?
Customer: What is code C112B ?