P1379 Ford -

Question

I have a 6.0 diesel on a 2006 f550 the engine won't start. It's also throwing codes for injector #3 and #8 what can I do? I have already replaced the ecu and that's not it.

Answer 1

P1379 FICM supply voltage circuit high

This is a power supply problem,where the FICM does not recieve the power it need, test the power at the FICM relay , or replace the FICM relay.