OK guys.... here we go... so I've got a 2005 duramax that im about ready to burn to the ground.... it keeps throwing the P2146 and P0207 codes which will shut down a whole control group and cause it to run like a dang kabota tractor... so... heres what all I have tried.

ice picked #7, nothing happened.

Checked wiring and found no problems visually.

replaced every connector, nothing happened.

Replaced the FICM, nothing happened.

bought an injector and started swapping it around to all the injectors in the circuit... still nothing.

The code is really weird sometimes it will fire up and run 30 miles before it comes back and sometimes its instantly. Every time i get a ways away and i cant get the code to delete so i can get it home i can unplug the ficm and plug it back in and the code will clear....

somebody save me from committing insurance fraud on this paper weight....

 

Did you find a solution to your issue im having the same problem replaced my connectors ohmed my injectors and checked wiring visually. Lasted 3k miles with a new connector before problem arose again.

 

PO201, PO202,PO203,PO204,PO205,PO206,PO207,PO208, P1249, P1246, P1293

My truck went into limp mode several months ago and I was told the injector connectors needed to be replaced on #7 cylinder and I believe #2 cylinder. I replaced both, erased the codes and it ran perfect. It's been raining here for weeks and we need it. I was driving in the rain the other night and the check engine light came on, a few seconds later the truck died. It restarted and died several times and went into limp mode, and sounded like what others call a tractor sound. I had it towed home two nights ago, and it's been sitting while I'm doing research, with no luck! I'm considering changing the other injector connectors, but am thinking maybe I should change the whole harness Any thoughts?