E89 code A68C

[Willboss007]

Hi all, after about a month with my e89 I felt like I had finally ironed out all of the issues that the car came with but, the roof has usually always worked. I had one hiccup where it took half an hour to reset and then worked. With the same suspected issue, this happened again the other day, so I had to leave the car for a day and came back to find it working. Just enough to close but not open again.


Attached is a pic of my code for me. What is seeming unusual about It to me is the fact that I don’t believe it to be broken wiring as it would just simply not work not occasionally work. Admittedly though I haven’t investigated for faulty wiring yet I believe it is a faulty hall sensor, but before I go needlessly by expensive parts, I wonder if anyone else has had the same issue

The roof will fully operate right up until the point where the rear shell has to lock into place I then get the roof warning message on the screen and it wont lock but after leaving the car and coming back and pressing the button again it locked.

Any help greatly appreciated thanks

[flybobbie]

Z4 beginning to sound like an Apollo disaster movie with all these codes.

It will probably be a broken wire.
Get your favorite tipple and spend some time going through forum.

[RobbiZ4]

It will probably be a broken wire.

I'd say there are 2 wires in the rear roof shell with broken insulations. That code typically indicates a short in the sensor wiring. No fault of the sensor itself! That is the reason why it may work once again the next day without an issue.

20210831_134551b.jpg (47.94 KiB) Viewed 505 times

As said dozens of times:
All of our E89 suffer on these broken wires, even 2016 built ones. No doubt, no exception!

Get the 1x2 and 2x2 sensor wires renewed in the rear roof shell in one shot, learn how to dismantle this roof shell (only 6 glued screws to remove) and replace the 6 sensor wires with flexible LiFY wires in the upper bow of the hydraulic harness.

[Willboss007]

Thanks for that

This weekend I’m going to go through the whole thing and fine everything luckily I’m an electrician so have cable etc on me thank you