Hi! Since i buy the car, i have a problem with can modules, but today the car went to limp mode, so i want to figure it out what's wrong.

CAR: 2003 BMW e60 530i - M54B30

My error codes after limp mode:

28DD - DME: Air mass system - Existent

28AE - DME: Torque limitation: Monitoring - Existent

5F77 - DSC: Engine management: Interface - Existent

D904 - CAS: K-CAN line fault - Existent

D907 - CAS: K-CAN communication fault - Not Existent

E584 - KBM: K-CAN line fault - Existent

E587 - KBM: K-CAN communication fault - Not Existent

9C77 - IHKA: Auxiliary-water pump - Existent

E244 - SZM: K-CAN line fault - Existent

E2C4 - CON: K-CAN line fault - Existent

9E5C - SMFA: Rapid heating area: cushion - Not Existent

E444 - SMFA: K-CAN line fault - Not Existent

E484 - SMBF: K-CAN line fault - Not Existent

E184 - CD/ M-ASK/CCC/RAD2/CHAMP-GW: K-CAN line fault - Not Existent

FFF2 - MOSTSYS: MOST ring break - Unknown

Codes after deleting:

E504 - LM: K-CAN line fault - Existent

D904 - CAS: K-CAN line fault - Existent

E584 - KBM: K-CAN line fault - Existent

9C77 - IHKA: Auxiliary-water pump - Existent

E244 - SZM: K-CAN line fault - Existent

E2C4 - CON: K-CAN line fault - Existent

E444 - SMFA: K-CAN line fault - Not Existent

E484 - SMBF: K-CAN line fault - Not Existent



I already tried:

- Cleaning ICV, Throttle Body. Re do and cleaning plug connections. Adapt Throttle Body.

- Replaced SGM, LM to LM2, DME, CAS

- Redo plugs in SMFA,SMBF, SZM, M-ASK

- Replaced MPM

- I tried to disconnect SMFA,SMBF and check, but nothing changed.

 

The question is: What can i try? I think probably the KBM is the problem, but everything works fine, so i don't know where i need to start

 

Did you ever figure this out? i have the same codes and same issue

 

I had this issue pop up the other day as well. Fortunately for me it ended up just being the drivers seat module. I figured I would just start unplugging modules one at a time and rescanning for codes and hope they would go away at some point. If that doesn't do it, probably a wire on the bus somewhere that is broken. When I unplugged my driver seat module the errors went away and returned when I reconnected. Fortunately I found a used module on Ebay for $10 that's on its way. Seat modules are the quickest thing to disconnect, also some of the modules in the trunk.

 

Which did u unplug the yellow one? under the seat?