回複：P1456 MEANS

Thank you.

Actually I just tried today, the noise is not from the engine. It sounds like it is from front left, it seems more obvious when I step on the gas, or make a turn. It is not exactly broken pipe sound either. More like what people would say "rattling sound." Anyway, hard to say. I just want to have some idea of what may be going on before I take it to a mechanic so i don't get fooled totally.