Comfortmatic Problem.

Apr 7, 2014
35
5
Norfolk
Funster No
30,895
MH
Autotrail Savannah
Exp
Since Jan 2014
Some advice needed from you knowledgeable people.
We have recently upgraded to an Autotrail (Fiat) 2011 with 3lt 6 speed comfortmatic gearbox, with 13000 miles.
We thought we should take her out for a couple of nights to get used to all the new to us controls both mechanically and with habitation. By the way this is our first Automatic.
We drove to within 2 miles of the site ( after about 70 miles with no problems ), and suddenly it jumped out of gear and was stuck in 2nd. The message CHECK TRANSMISSION and warning light came on also CHECK STEERING and warning light. Then a message AVOID CHANGING GEAR TO OFTEN appeared. We crawled into the site,then checked both transmission and power steering levels. Transmission level was halfway between max and min, the power steering was on minimum.
I topped up both reservoirs before we left for home.
All going well on homeward journey until I exited main A road at our home town at roundabout when again it jumped out into 2nd gear then CHECK ENGINE and warning light appeared. Quite frightening and dangerous.
Has anyone had same problems or know the cause.

In the last two weeks I have had a tracker/ alarm fitted if this may have any connection to this problem.

TIA.
 

Kannon Fodda

LIFE MEMBER
Feb 26, 2019
1,190
3,040
Surrey
Funster No
58,768
MH
Autotrail V-line 540
Exp
Almost a N00B !
I've managed to confuse my Comfortmatic once, when it went into some sort of limp mode, but that was when driving along dual carriageway. Looking back I think I was hovering between brake and accelerator in traffic that was speed was varying a lot so not quite sure if we would need to slow or accelerate. I think it's quite possible to send the robotised system mixed signals if you swap from braking and accelerator very swiftly. Even so it was disconcerting as until I could actually pull over, and turn off the engine the limp mode remained. At that time I would have only done around a 1000 miles, but it's been fine since over the next 7000.

If your MH has only done 13000 miles since 2011, it's not gone anywhere really, and many trips may have been quite short. Whether simply doing nothing has caused a problem (mechanics like to be used) I dunno. You may have to find a Fiat Professional garage who can do some diagnostics as the behaviour shouldn't be considered normal, or roadworthy.

Worth forewarning your MH dealer of a problem in case there is something amis that you need them to be resolving as part of any purchase warranty.
 
Jun 22, 2012
2,348
20,479
Sherborne Dorset
Funster No
21,586
MH
Van Conversion
Exp
Since 2012
Like Kannon Fodda I’d notify your dealer straight away. We are on our first Comfirmatic and although I’m not a great fan nothing weird like that has happened when we’ve been driving it. However, we bought it brand new 20 months ago and after a few months it had to go back to the dealer. When they were driving it back it broke down! That was a problem with the gears, the driver couldn’t get it to move between gears on the motorway. It then spent another month at a Fiat Professional in the Nottingham area, it wasn’t the mechanical bit, it was an electronic problem which is apparently better. Clearly I have no understanding of the mechanics but the driver when he finally did bring it back, like you, said it was pretty alarming and not something he’d experienced.

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Dec 11, 2011
793
1,612
Nr Hastings, East Sussex
Funster No
19,165
MH
Auto-Trail Apache 634
Exp
since 2010
Oct 7, 2011
304
347
hereford
Funster No
18,408
MH
a class
Exp
since 1980
I have an old Merc sprinter based van which has a sprintshift gearbox. I think that this is also a robotised manual.
Anyway I don't know if this will be any help to you but I had a problem when it wouldn't change gear in auto but worked fine when in manual.
It turned out that the sender on the rear wheel was feeding incorrect speed info to the gearbox so it didn't know which gear to be in.
Very easily fixed and the only difficult bit was getting the old one off as it had rusted on.
 
Nov 3, 2013
2,313
4,979
Portugal
Funster No
28,868
MH
Fiat Ducato Auto Wildax
Exp
C/van since '73 .M/h.2009
Hi.
It does NOT like "Quick brake/accelerator " moves. This caught me out,mates lad drove one at work and told me. Problem solved.
Tea Bag

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Jan 22, 2020
910
1,309
North Somerset
Funster No
68,245
MH
Sunlight Cliff 600
Exp
September 2020
Some advice needed from you knowledgeable people.
We have recently upgraded to an Autotrail (Fiat) 2011 with 3lt 6 speed comfortmatic gearbox, with 13000 miles.
We thought we should take her out for a couple of nights to get used to all the new to us controls both mechanically and with habitation. By the way this is our first Automatic.
We drove to within 2 miles of the site ( after about 70 miles with no problems ), and suddenly it jumped out of gear and was stuck in 2nd. The message CHECK TRANSMISSION and warning light came on also CHECK STEERING and warning light. Then a message AVOID CHANGING GEAR TO OFTEN appeared. We crawled into the site,then checked both transmission and power steering levels. Transmission level was halfway between max and min, the power steering was on minimum.
I topped up both reservoirs before we left for home.
All going well on homeward journey until I exited main A road at our home town at roundabout when again it jumped out into 2nd gear then CHECK ENGINE and warning light appeared. Quite frightening and dangerous.
Has anyone had same problems or know the cause.

In the last two weeks I have had a tracker/ alarm fitted if this may have any connection to this problem.

TIA.

That’s a lot of topping up for a 13000 mile vehicle. Either leaks or poor servicing?
 
Jul 2, 2019
234
954
doncaster
Funster No
62,107
MH
just looking
Exp
since 2010
We had autotrail comfortmatic, brokedown and was in dealers for months,the dealers couldnt get it repaired,we ended up part exing for a new one it was a very stressfull expensive time, i only have to say the word comfortmatic for hubbys blood pressure to shoot thru roof lol, but i know lots of people like them :

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johnnyboy

Free Member
May 30, 2021
5
4
Funster No
81,586
MH
autocruise rhythm
Hi
I’m experiencing the same problem - did you find a solution? I think the comment about rapid switching between brake and acceleration could be relevant as two times it happened to me I was caught in lots of traffic.
 
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