PeteG
Well-Known Member
Have a D5K2 serial number CAT00D5 KEKY208542 that just started throwing E1389 (1) code. From what I’ve read on here I think I’m going to need to try and force a regen first, as there was another thread a few years back but I wanted to double check. Also getting code 5856-9, which I believe is related and the ECU isn’t receiving the after treatment information correctly? I am getting access to Cat ET tomorrow hopefully, but wanted to make sure I’m on the right track before the codes get to a level 2 or 3. Thank you.