The engine P1745 Code is an important thing what contains some information of the car engine problem. The problem of the car engine may start from detonation, or spark knock what is a type of burning produced by the accumulation of too much temperature and burden in the engine’s burning compartment. When this thing happens, you should be capable to listen a metallic hitting or pinging noise. A small amount of detonation usually will not reason main harm, but heavy knocks or lengthy detonation can cause thoughtful damage to your parts. It can punch holes in your pistons, crush rod bearings, blow head gaskets, crack rings, and pound out piston ring grooves.