P0300, P0351, P0353, P0355, P0357

[Sparkyz07Denali]

So I got home from work, Parked my 07 Denali nothing was wrong. Next morning get in it to go to work runs like dog shit, zero power then the C.E.L starts blinking. I pull the code with my basic reader. and I get P0300, P0351, P0353, P0355, P0357. Read somewhere that the crank position sensor needed relearning and can cause the entire left bank not to fire. I purchased a Innova 5610 so I can do the relearn. Before I do that i replaced the spark plugs and wires. And I replace the coil harness for the left bank (used GM part) no change still throwing the code. I have a 2007 Yukon Denali 6.2L truck has 230K miles. When I did the re-learn got a lean condition. When I changed the plugs, old plugs smelled of raw fuel. They are not firing.

 

[Fless]

To be clear, a crank relearn works on all cylinders, not just one bank. If the crank/cam correlation was off it would affect both banks.

So it sounds like the injectors are firing but perhaps the coils aren't. Get the DVM out and check the power to the coils on that bank to see if positive or negative is missing.