Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

BMW X5 40d // Fault code: 49A6

Post Reply
User avatar
XP3NNY
Newbie
Newbie
Posts: 42
Joined: Thu Oct 18, 2018 3:23 pm

BMW X5 40d // Fault code: 49A6

Post by XP3NNY » Thu Nov 01, 2018 12:54 pm

When I ran diagnostics with Carly I got fault 49A6 - LIN bus communication. From my research its most likely faulty Glow plug controller which is a bit of a job to do, but doable.

Anyone knows what would be the visible symptoms of this issue? Anyone else had this fault? There are no other errors around glow plugs etc.

Cheers 

*** Wrong section, could Admin please move this into E70 / Problems? Thanks ***
Last edited by XP3NNY on Thu Nov 01, 2018 12:57 pm, edited 1 time in total.
BMW X5 40D SE // 2010

User avatar
marti
Member
Member
Posts: 768
Joined: Tue Jan 19, 2016 11:33 am
Location: Norfolk

Re: BMW X5 40d // Fault code: 49A6

Post by marti » Thu Nov 01, 2018 4:53 pm

If the glow plug relay is faulty, you will get a read out on diagnostics that all 6 glow plugs have a fault, the symptoms are hard to start or wont start at all....

As you say bit of a pain to do...did mine and the time consuming part is removing the intake manifold, so make sure you purchase a new gasket set first and some spare nuts for the bottom row as they are not captive like the top row and you will loss one or two if you dont have a strong magnetic socket.

AdamsX5
Member
Member
Posts: 305
Joined: Wed Sep 26, 2018 3:54 pm

Re: BMW X5 40d // Fault code: 49A6

Post by AdamsX5 » Mon Dec 10, 2018 2:08 pm

Not sure how you went with the glow plug controller replacement but my exact code the dealer said no problem with controller or wiring.
Seems a problem with ECU they say.
Not sure what the next step is now.

Lukematt7
Newbie
Newbie
Posts: 1
Joined: Sat Jan 11, 2020 5:27 pm

Re: BMW X5 40d // Fault code: 49A6

Post by Lukematt7 » Sat Jan 11, 2020 5:31 pm

Did you ever cure this fault? Having the same issue at the moment

User avatar
X5Sport
Global Moderator
Global Moderator
Posts: 18508
Joined: Fri Sep 03, 2010 4:09 pm
Location: Planet X6......

Re: BMW X5 40d // Fault code: 49A6

Post by X5Sport » Sat Jan 11, 2020 6:40 pm

It comes back as an error code between the ECU and Glowplug Controller.

https://www.xbimmers.com/forums/showthr ... ?t=1414030
:ant: Never anthropomorphise computers. They hate that.

AdamsX5
Member
Member
Posts: 305
Joined: Wed Sep 26, 2018 3:54 pm

Re: BMW X5 40d // Fault code: 49A6

Post by AdamsX5 » Wed Jan 15, 2020 9:20 pm

Changed the glow plug controller and never
Looked back. Common fault. But it may be wiring if you not so lucky.

Post Reply