49A6 - LIN bus Communication fault - BMW X5 E70 2012
 

Hi,

I have two BMW X5 E70 3.0D LCI 2012 and 2012), both have the same fault code:
49A6 - LIN bus Communication fault

The first car (2011) had problems starting on cold morning, with lots of white smoke…
For this car i bought a new Beru glow plug module and fault was cleared 👍🏻

The second car (2012) has no problem on cold mornings, no white smoke…
On the second car I did the same procedure and fitted a new Beru Glow plug module, but the error won’t clear…(no other error codes on this car at all)
(Maybe it’s a faulty module…but it’s a brand new Beru GS108)

Has anyone had this fault and found any other solution than to replace the glow plug module? What was the problem?

Extra information:
In ISTA-D both the old and the new Glow Plug Module (in car 2012) reads:
Current status of preheating control
Reference field dependent glowing
Power consumption 6553.5W

FWIW... sometimes the glow plugs go bad and THAT kills the GP module.


When you replace the module and not the GPs, you *may* find the module failing later...


Replacing them all at once is the best practice.


On the second car if one GP is a dead short, it may be causing the new module to still error...


Just saying