p0605 is PCM Read only memory test error.
p1211? I dont have a code for that, are you sure it's 1211??
Here's what I suggest you do.
The p0605, is a pcm code, which means that the pcm is not right at all, or that the PCM may have had, or has a chip/.program installed.
I think, before you go trying anything else, I would look at that p0605 as a possibility. I dont know why i dont have p1211 in my stuff.
There is a p1210 which is a hpop pressure high condition, which could point to a failing Injection pressure sensor, or injection pressure regulator.
there is also p1209 which is hpop pressure sensor fault.
Does your turbocharger spool, i.e. whistle??
I hope this helps, i'll be watching this thread.
Last edited by ~CrazyDiesel~ : 01-21-2007 at 11:07 PM.
Reason: adding more info