dowahdiddyman:
Mine keeps throwing fault codes at me,03778/10 and 03779/10. When these come up its always when im in the final stages of braking and it also de-rates for a few seconds. Sick of reporting it to Man service when it goes in to be honest.
These are to do with the common rail system, one of mine had the same problems, and then it developed into a loss of power sporadically when the engine was pulling up a hill.
It was in and out of the MAN dealers, technical guys from swindon were in it every other week trying to find the problem, they never did so i part ex’d it.