Hello all! Long time lurker, first time poster.

I recently had my Mustang pop the code P0355. A quick google search led me to find out its an issue with cylinder five. Replaced the coil and plug but the code still pops up and the engine is definitely running rough. Shaking while idle and a definite loss in power.

I took it to my mechanic to see if he could fix it and he thinks its the PCM and quoted me $1400 to replace and reprogram it.

My question is this: Is this a common code in...

PCM issue? Code P0355 (2012 3.7L)