Archived Code P0203 & P2146

[Seisenbath]

07 5.9 w/Bully Dog Programmer (on truck when bought) 207xxx miles, automatic 4wd. So a few minutes ago the check engine light came on, checked the code on the programmer and here's what came up:

P0203 Injector circuit open cylinder - cylinder 3 - which I assume is the electrical circuit, but where do I start to trouble shoot?

P2146 Fuel Injector group supply voltage circuit open.

I'll do a search on here to see if I can find trouble shooting tips. Thanks for any help.

Steven

 

[Bob4x4]

ohm out the injector ckts and injectors

 

[JJPage]

should be in the forward injector harness 1-3, rearward harness 4-6. This is how an 03 valve cover gasket is configured, on an 07 something tells me the injector harness is configured in groups of two, 1-2, 3-4, 5-6, but IDKN if this is correct, might be wrong and it also is in two groups of 3.

I would dis-connect and clean the forward/reward harness connections outside the VC 1st, then pull VC and test inside connections, then also ohm out injector(s) solenoids. IIRC should be around .5 ohms, if #3 is open, you found the culprit. You need to ohm out the injector harness itself also, could have broken where it passes through VC.

A member on here just posted a "how to" on replacing a faulty solenoid on a single injector without pulling the injector, a true field replacement, might be real handy for you. Jess

 

[Seisenbath]

Thanks for your help. I read other post and your suggestions and took ohm readings on the injectors.

1 .4
2 .4
3 14.6
4 .3
5 1.6
6 .3

Wonder which one is bad? So 2 of the the six are bad of course so I ordered 6 new ones from DDP. I've used them before with good luck so I did it again.

Thanks again for the suggestions. Jess, I read one of the post about using a used solenoid but the general consensus was it wasn't a good idea.