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joelc's avatar
joelc
Nomad
Dec 10, 2013

Engine light and Wrench code 2006 F-350 Diesel

We are full timers and when we were towing our 5th wheel in September to a campground in N.C. my truck engine light went on and I lost power going up a hill. I was able to pull over and shut the truc...
Bill___Kate's avatar
Bill___Kate
Explorer
Dec 11, 2013
As mentioned above, the 6.0L's often have low voltage problems. The alternators that Ford uses OEM have marginal capacity for the load, especially if you are charging the trailer batteries while underway.

Here is a great website that discusses the whole problem:

FICM Repair

My guess is that your batteries are getting weak, and starting to effect the FICM which is throwing low voltage codes. It is best to take care of it before the alternator and FICM go bad - don't ask me how I know .....

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