I have a 2006 F-350 4x4 Dully 6.0L Power Stroke Diesel. Just got the EGR delete kit put on and SCT Programmer. The other week I had a battery go bad and always had to have someone jump start me I replaced both batteries in the truck. Everything was good then a couple days later my coolant reservoir got a hole in it and overheated the truck but soon as I notice the gage I turned the truck off and opened the hood to let it cool down. I ended up replacing the coolant reservoir, thermostat, top radiator hose, and the fan clutch. Then after all that the truck ran good for a couple days. But now when you start the truck it shakes at idol and when you drive it. So I brought it to auto zone so they could run a test on it. It through 4 codes: PO267- Cylinder 3 injector circuit low, PO683- Glow Plug Control Module to PCM communication circuit, PO672- Cylinder 2 Glow Plug Circuit Open, PO675- Cylinder 5 Glow plug circuit open. I was told by a diesel mechanic with the low voltage from the bad batteries and were the truck barley over headed it might be the FICM went bad so I checked the voltage coming out of the FICM and it still pushing out 48. What would make these codes come up all at once and make my truck shake when you start it and drive it?

 

Sounds like injector#3 needs replaced.

the GP codes could be a glow plugs or a module. You will need to trouble shoot that more.

The FICM voltage needs to be checked at startup and again at operating temperature. If the high side voltage drops below 45 volts at anytime you need to replace it or take it apart and see if you have a bad solder joint or burnt items.

Also you need to check the FICM low side voltage as well. it should never go below 11.5-12.5 at start up.

You have a few issues going on there. Check the FICM and if it is good toss an injector in it. Then trouble shoot the GP issues.

 

how do you check the FICM low side? I was told when checking the FICM high side that the motor had to be cold not at operation temp.

 

You need to pick up something to read live data.

I use a Scan Gauge 2 and programmed the x codes into it.

Some guys buy a blue tooth obd2 adapter and download an app or software onto their smart phones.

With either one of those you can monitor the FMP(high side) and FLP(low side) voltage at start up.

I use to have my ASE certs years ago. I was taught that you look at the first code and go from there. Usually the first code is causing the other codes.

 

I posted this in your other thread

Here's some good trouble shooting for the FICM without a scanner