code 35 and 26

[Barry Nave]

I have read the search on the 35 and will do all.
could not find any on the 26.
I do have JK boost control, any thoughts.

[Barry Nave]

This must of been way over some heads,so thinking way back in years with the DP I did the one and only thing that I have not done or dealt with. Pull rad holding tank and went to the fire wall wiring.Codes are gone,no more ses. :D So when the ses get the better of you and you try changing parts that were still good. Think about the fire wall wiring ;)

[curmudge1]

Last winter, I was seeing SES light when the engine is cold, during colder weather & just started seeing the same symptom again (NJ weather). Goes away after the engine warms up. IIRC, the DTC code was 35. Recently, Had a local dealer, NOT a diesel expert shop, check out the grounds & they said they did. No help.

So, are there any ground wires behind the coolant tank on the firewall? Thanks in advance.
David Strom