My 2006 is registering code P2149. The truck has 199k miles. The injectors were all replaced at 145k.
I have done an ohmn test and determined that the wiring is okay. Number 6 injector has a high ohmn reading. How do I determine if it is the injector or the solenoid?

 

As you probably know P2149 means low voltage on injectors bank 2, 4-6. P2146 is for bank 1, 1-3 injectors. In my opinion the ECM is programmed to send this code when there is an intermittent or permanent issue with the wiring in the valve gasket or the injector's solenoids. I'm going thru the same issue right now combined with other codes but myself, I've already changed the valve cover gasket with a new one and because the truck is running really rough I believe in my case is the solenoid or probably the whole injector/s. And I got good readings with the multimeter. What was yours by the way and how is the truck running?

 

The truck runs like crap. Shakes no power. Will occasionally smooth out for a split second.
The code Readout from Auto Zone said probable cause short circuit / faulty ECM. I replaced the ECM with a rebuilt one. It ran the same, new check, same code.
Checked ohms reading at the injector and then at the harness connector. Same reading at both. The #6 was high both places. Removed the wire from the injector. Checked ohms from one end of the wire to the harness connector. Got a low reading. Checked at the injector with the wire disconnected and still got a 3 ohms reading.
At this point I don't know if it's the injector or the solenoid. Obviously I'd rather change the solenoid than the injector.

 

Same here. I replaced the ECM with a remanufactured one from Automodulesource, the original one was badly corroded inside. I used to get a lot of codes, over 20. Now I'm down to 4, one for skim, two codes for the injectors banks and one for #6 injector circuit being disconnected because that's the only way i can start the truck but i can't drive it. I have a recent thread on this matter and waiting for inputs. In the meantime i will take them out and replace the solenoids just to eliminate this issue. Also clean the nozzles or replace them. I'll update my thread when done but it will take at least a couple of weeks due to time constraints. Let me know what you did. Thanks

 

Solenoid is the electrical part that has resistance and it's part of the injector.
You can either change the solenoid or the whole injector which is including the solenoid.

 

One at a time, disconnect both wires from each injector and insulate the terminal ends so the circuit will not short to ground on the effected bank (1-3 for P2146 or 4-6 for P2149). Clear the codes and start the engine, check if the same code resets. If an injector is disconnected and the code does not reset, replace that injector.

 

Hey BigIron70, how many injector wires can you have disconnected at the same time and still be able to start the engine, do you know?

 

I have only done one at a time, why would you want to disconnect more then one at a time? Engine is capable of running on just 3 cylinders.

 

I don't want to disconnect more then one at a time. Until now I thought that my #6 is the only bad injector/solenoid but now I think I might have more then one injectors/solenoids bad. I wasn't sure how many good ones you need in order to start the truck. In my case, the engine is running so that means I might have up to three bad ones and based on the codes they are spread in both banks. Thanks for clearing that one for me.

 

Swap your #6 injector to another location to see if the problem follows.
If you have to disconnect that injector for the truck to start then it's the injector problem. If you still need to disconnect the #6 wiring to start the truck then it's the wiring problem.
Fix one at a time if you think you have more than one problem!!!

 

Action since my first post:
1) Code P2149
2) ECM checked out OK
3) Wiring in gasket-OK
4) Wiring from gasket to ECM-OK
5) Injector Solenoids all .4 except #6- 9.3
6) Replaced #6 Solenoid now all are reading .4
7) Cleared all DTC,s. Reprogramed with my Superchip to stock/factory setting.
8) before this work the truck would start, run like crap, no power. Now the truck won't even start.
Does anyone have suggestions?
THANKS FOR ANY HELP!

 

Did you miss anything in putting things back together?
Were the battery fully charged up?
Was the lift pump running?
Can you tell lift pump pressure?

 

PWONG Thanks for the reply.
I checked everything over several times. I can hear the pump running. Don't have a way to check pressure but would assume if it was running 5 days earlier it would be fine.
After trying to start it I ran the batteries down. Charged over night. Seem to be fine.

 

I've got the same code and my truck will "skip" when I first crank it . I'm going to pull all six and take them to my fuel shop to be checked. I did this around 150000 miles ago and had a bad one. It's really not a bad job just one I don't think we should have to do every 150000 miles.

 

I just ohm'd my injectors, thru the wiring harness on the top of the valve cover. (2006 5.9)
5 of them were 0.7 ohm or 0.8 ohm
1 of them was 0.2 ohm

bad injector? possibly bad wiring under valve cover?