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Flippin' eck "suspension faulty" message
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Sea6Steve   
Mon May 28 2018, 11:32am
Joined: Feb 15 2018
Member No: #3435
Location: Lincoln
 Morning guys,

After my first 5000 trouble free miles in the first couple of months ownership, the dreaded "suspension faulty" message has popped up.

The rear end on the car has gone very hard, and raised to what looks like the highest setting. (obviously un-driveable like that)

The front does just as it should, but even when selection 'low' height, the rear still sits very high.

The car has a massive (£20k+) main-dealer service history, and had only just had £3000 spent on it's 10 year service, prior to my purchase.

Any pointers guys? and anything can be done without reverting to main dealer (car in Lincoln currently)2.7hdi Exclusive (2007)

Cheers
Steve
Hattershaun   
Tue May 29 2018, 06:25am
Joined: Dec 19 2010
Member No: #320
Location: Bedfordshire, UK
 Could be the height sensor linkages have seized, snapped or become detached from the sensors.

There are four sensors, one for each wheel, the linkage is about 5cm long with a cup on each end which presses onto a ball on a bracket at one end and the sensor at the other end.
It's common for them to get rusty, if not greased occasionally.

Usual warnings about being careful if you are going under the car, make sure it's supported properly.
C6Dave   
Tue May 29 2018, 07:55am

Joined: Oct 01 2009
Member No: #1
Location: Northumberland
Hattershaun wrote ...

the linkage is about 5cm long with a cup on each end which presses onto a ball on a bracket at one end and the sensor at the other end.

Interesting Shaun, so basically the same as the old Xantia rear one which would become detached causing a similar issue.
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Hattershaun   
Tue May 29 2018, 12:35pm
Joined: Dec 19 2010
Member No: #320
Location: Bedfordshire, UK
Dave-Retired wrote ...

Hattershaun wrote ...

the linkage is about 5cm long with a cup on each end which presses onto a ball on a bracket at one end and the sensor at the other end.

Interesting Shaun, so basically the same as the old Xantia rear one which would become detached causing a similar issue.


Yes, very similar in terms of a small linkage. The C6 height sensors are electronic rheostats, where as the Xantia is a hydraulic unit.
On one of my C6 the front linkage snapped as the ball had rusted into the cup, front end dropped down and didn't respond to a request to change height.
Sea6Steve   
Fri Jun 01 2018, 08:19am
Joined: Feb 15 2018
Member No: #3435
Location: Lincoln
 Thanks for the response guys...
Been away for a few days, but will have a look over the weekend hopefully!
(Its back into the Audi A6 tdi workhorse for a few days now)

Interestingly, I've just had both front tyres replaced.
Don't suppose fiddling with something on the front will affect the rear?

Cheers
Steve
Hattershaun   
Sat Jun 02 2018, 05:51am
Joined: Dec 19 2010
Member No: #320
Location: Bedfordshire, UK
 I've known the brackets that hold the height sensor to get bent when work is carried out on front suspension, so, feasible a tyre fitter could have accidentally knocked or moved the bracket when changing a tyre.
This should affect the front ride heights, but lowering at the front could make the rear seem higher. Just a theory.
The ride heights only need to be a tiny bit different to the correct level to affect the ride quality, I.e. Suspension gets much stiffer.
Good luck getting it sorted.
Tjensen   
Sat Jun 02 2018, 11:51am
Joined: Jul 17 2012
Member No: #954
Location: Bergen
 If the front tyres were changed "with all wheels hanging", the rear system may have ben forced out of its comfort zone, jammed and then snapped ?
Sea6Steve   
Sun Jun 10 2018, 12:22pm
Joined: Feb 15 2018
Member No: #3435
Location: Lincoln
Tjensen wrote ...

If the front tyres were changed "with all wheels hanging", the rear system may have ben forced out of its comfort zone, jammed and then snapped ?


This might well be the case... Im back in the Audi A6 for now and haven't had chance to investigate the rear 'jack up' yet.

Fingers crossed it isn't anything too costly...
Sea6Steve   
Sat Jul 28 2018, 10:26am
Joined: Feb 15 2018
Member No: #3435
Location: Lincoln
Hattershaun wrote ...

There are four sensors, one for each wheel, the linkage is about 5cm long with a cup on each end which presses onto a ball on a bracket at one end and the sensor at the other end.


Just a quick update guys, it was one of the rear sensors that had 'popped-out' of the ball joint. cleaned it up, and pressed back on, and all is well with the world again...
 

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