M4 DCT Seeking reassurance or ammo

M4 DCT Seeking reassurance or ammo

Author
Discussion

popeofmick

Original Poster:

29 posts

141 months

Wednesday 30th November 2022
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Hi all, the wife has recently purchased an F83 M4 2016 from BMW with the AUC warranty. Car is currently sat at 58k and apart from the miles looks to be in excellent condition.

Anyway the subject of this post is a specific incident that happened yesterday. She had driven the car 5 or so miles in normal condition and had parked up in a retail car park. Returning to the car 15 minutes later she started it up reversed out the space and pulled forward, at this point the car threw a Transmission Hot warning drive carefully a few minutes later all was good. (She said she had caught the M1 button steering out but ours is set to default level 2 on the DCT)

So I have just read the transmission ECU and I have a fault 40DE01 temperature clutch phase red.

My question is this normal given the circumstances or should I get it back to BMW?

If she had been is stop start traffic I could understand it, the fact is the car had been off for 15 minutes and had a steady drive there worries me that the Clutches are on the way out but I have no idea.

Stone Cold

1,545 posts

180 months

Wednesday 30th November 2022
quotequote all
Nope not normal, my M4 is a daily so used in all sorts of conditions and has been (gently) tracked once and this has never happened, back to BMW is my advice

popeofmick

Original Poster:

29 posts

141 months

Wednesday 30th November 2022
quotequote all
Thanks mate that's what I thought.

Superlightdaa

131 posts

125 months

Thursday 1st December 2022
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Stone Cold said:
Nope not normal, my M4 is a daily so used in all sorts of conditions and has been (gently) tracked once and this has never happened, back to BMW is my advice
Agreed

Notsofastfrank

216 posts

202 months

Thursday 1st December 2022
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Superlightdaa said:
Stone Cold said:
Nope not normal, my M4 is a daily so used in all sorts of conditions and has been (gently) tracked once and this has never happened, back to BMW is my advice
Agreed
+1

popeofmick

Original Poster:

29 posts

141 months

Thursday 1st December 2022
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Cheers all it's now booked in to be looked at.

Stone Cold

1,545 posts

180 months

Tuesday 6th December 2022
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Any update OP

popeofmick

Original Poster:

29 posts

141 months

Wednesday 22nd February 2023
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Yeah BMW checked it with the diagnostics and agreed it had overheated as it was logged. They said as it had not happened since (this was 3 weeks after the fact) and all parameter for the DCT were fine it was a no fault found.

However now the heater has stopped working (blower ok no heat) Checked the coolant and the main reservoir is completely empty. Not sure if its related but starting to think we brought an Approved Used Lemon. Looking forward to another trip to BMW for them to tell me its normal for a pressurised sealed system to lose enough fluid to completely empty the reservoir in the 3000 miles since they did their "AUC Prep"

tgr

1,138 posts

178 months

Friday 24th February 2023
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Does the gearbox get cooled by the radiator?

popeofmick

Original Poster:

29 posts

141 months

Friday 24th February 2023
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Yeah I think the DCT oil cooler is on the cooling circuit so it may be linked. I topped it up yesterday 1.4 litres and she took it to work 60 mile round trip, checked again today and it took another litre so it getting out somewhere.

tgr

1,138 posts

178 months

Saturday 25th February 2023
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Hmm. Could easily be something trivial like a loose connector or a split hose and all of a sudden your transmission is damaged