570s - "transmission fault - call mclaren"

570s - "transmission fault - call mclaren"

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vantager

Original Poster:

197 posts

205 months

Wednesday 28th April 2021
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Anyone had this problem - its happened twice in a couple of days.

First time - reversed into the garage and tried to select N - "transmission fault - call mclaren" appeared on the screen
Second time - car was on the drive (got it out of the garage 10 mins before that morning) - started it up and tried to select "D" - "transmission fault - call mclaren" appeared on the screen.

Mclaren Assist came out and could not find anything apart from numerous unrelated uncleared faults (which they cleared).

vantager

Original Poster:

197 posts

205 months

Wednesday 28th April 2021
quotequote all
Thanks davek, and yes, I do have a warranty (just bought the car actually).
Bit of a shame as the car is brilliant but I did the 'lock it up and come back later' thing.
My concern is, this may happen when its NOT on my drive and I could be 'stuck' waiting for it to clear itself!

FYI - Mclaren assist came out and found nothing except unrelated error codes logged, which they cleared. They said MAYBE the car had been left out with the roof down in a shower, and rain had got under the D/N/R switches.

Edited by vantager on Wednesday 28th April 12:51

vantager

Original Poster:

197 posts

205 months

Wednesday 28th April 2021
quotequote all
To clarify, when I get 'transmission fault' I cant get ANY gears - so a bit limiting.

vantager

Original Poster:

197 posts

205 months

Wednesday 28th April 2021
quotequote all
Thas interesting - did it take long to go from the fault to limp home mode? My car has only done 3000 miles in 3years - so maybe new car gremlins not all discovered?!

vantager

Original Poster:

197 posts

205 months

Thursday 29th April 2021
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Always seems to be when just started and trying to select a gear for the first time OR just reversed into the garage (form start) and going from R to N.
Either way, its just done it again, so thats 3 times in 5 days of ownership (one of which I didnt drive it) so should be fixable by Mclaren (my next port of call).
Still a lovely car though - just bad luck.

vantager

Original Poster:

197 posts

205 months

Sunday 2nd May 2021
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Did not try that specifically, but it would have been through quite a few cycles in normal driving on some days. It was always ok if you left it for half an hour!

Anyway, its back with Mclaren now. Have to say they were very good when I reported this.
Within 90 minutes of calling Mclaren Assist the car was on the back of a truck on its way to Mclaren and I had a hire car.
I will let you all know how this goes.

vantager

Original Poster:

197 posts

205 months

Tuesday 4th May 2021
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To an earlier question - 'what hire car did you get' - it was a very well smoked in Mercedes A class from Enterprise.
So bad I couldnt sit in it without feeling a little sick - called them today and said 'take it back'.
I will give this feedback to Mclaren Assist - to be fair I knew I wouldnt get a Mclaren, but expected a bit better than a Mercedes A.

vantager

Original Poster:

197 posts

205 months

Wednesday 5th May 2021
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Day 2 at the dealer (due long weekend) and they said the car has no relevant codes stored and they have not seen the fault.
They have removed & cleaned the gearbox earth straps (I suspect thanks to the advice I passed on from justin220).
My comment was "Sounds like an untraceable and intermittent fault" - the worst kind!
A bit torn over what to do with this as I really dont want a car in and out of the garage looking for an unfixable problem (like getting a gear!)

vantager

Original Poster:

197 posts

205 months

Sunday 9th May 2021
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Got my car back Friday and have driven it every day since (3 now) and not seen the fault - hopefully its gone.
Asked them what was done (as they never saw the fault) and it was:

1. Connect MDS & check for DTC’s – no relevant codes stored, carry out road test – no fault found.
2. Carry out volt drop test to rear subframe – within spec.
3. Check gearbox earth strap – remove, clean & refit – all ok << suspect this was because I suggested it as a result of justin_220 post
4. Check software is up to date with latest versions, carried out updates on DMC, EHPS, ECM, DMR, FWM.
5. Carry out all post software resets including un-pair immobilizer – all ok.
6. A further 4 road tests were carried out including a cold test – all ok.

I did ask (as someone who has been in software development for 40 years) why they didnt call Mclaren and ask WHY the code might raise this fault - surely there are N reasons and N isnt too large a number - but they didnt.

It should also be easy to log the line number in the code where faults are raised too, which would make diagnosis a lot easier. Anyone out there a software developer in the car industry who can tell me why you dont do this?

Cant help but be impressed by the care taken by Mclaren Assist in transporting the car there and back too.

vantager

Original Poster:

197 posts

205 months

Tuesday 18th May 2021
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So had my car back 12 days now and its been faultless. Getting used to weirdness - like to lower the vehicle lift once up, you raise the lever first, and the problem holding radio stations - but the car is lovely to drive and quite a change after several Porsche's. Gets loads of attention. Done 450 miles in it now. It had previously done 3000 in 27 months, so its probably feeling shell shocked.

vantager

Original Poster:

197 posts

205 months

Wednesday 26th May 2021
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Just seen someone asked for a photo - so here it is.