- Sep 17, 2012
Got an lml in the shop that keeps getting code p128E and going into reduced power. Any idea on what the gm fixes are for this? Truck just had a complete new fuel system installled due to cp4 crapping out and the install work was less than good. I believe this to be the cause. Code wasn't pressent before IP bombed. Efilive shows actual rail going to max and injectors start rattling. It is not consistent with anything. Almost acts like bad fca connection. Google tells me this is not a common code.