[twin fed]

So I know that this has been covered before and I have read the posts, but I have been getting them. It typically happens at about 120mph in, I think in 4th gear. It has already been to the dealer, they say that when they scan the car they can see the malfunction registered but they don't know why. I told them about what I read on the fourms about software updates and even showed him the posts but he had no real answers for me , except this..... I have the exhaust valve bypass installed and they told me that they have seen this cause the problem before and I should take it out. The main problem is that the problem is not easily repeatable. Meaning I can not get it to do it specifically. Sometimes it happens and sometimes it won't. I will take it out but I cant see how this can cause a drivetrain malfunction. The only other mods are the FabSpeed HFC and Dinan resonator delete. Nothing to the computer. Any help would be great.

[FSociety]

No tune ? I've only seen DTMAL with bad gas or bad tune

[twin fed]

I don't know either. I don't think that is was bad gas as the car was running fine otherwise. It is so frustrating because I don't know when and if this will continue to happen. I love pushing the car but now I always have this in the back of my mind.

[FSociety]

Originally Posted by twin fed

I don't know either. I don't think that is was bad gas as the car was running fine otherwise. It is so frustrating because I don't know when and if this will continue to happen. I love pushing the car but now I always have this in the back of my mind.

no jb+ or Dinan sport hooked up ?

[ZPrime]

A HFC could certainly cause the car to think that something is wrong.

[twin fed]

Originally Posted by FSociety

no jb+ or Dinan sport hooked up ?

Nope, I had taken the JB+ out months ago.

[twin fed]

Originally Posted by ZPrime

A HFC could certainly cause the car to think that something is wrong.

I spoke to the dealer about that and he did not think that would cause it. People with completely stock cars are getting the same warning.

[QM]

Just a thought. Could it be fuel starvation? There's been a number of reports of fuel pump issues at the track with less than 1/4 tank at high rpm.

[twin fed]

Originally Posted by QM

Just a thought. Could it be fuel starvation? There's been a number of reports of fuel pump issues at the track with less than 1/4 tank at high rpm.

I guess that it is possible, I would have to try and duplicate it. But there was no noticeable signs of that while driving. The acceleration was smooth until the warning came up.

[MR.]

Easy solution by the looks of it! Your HFC might be causing the issue here.

Ask the dealer to do PUMA 62732575-01, after that retry if you have the issue.

Same thing happened to my car, the drivetrain needed to be re-calibrated and adjusted to your new set up.

MR

[twin fed]

Originally Posted by MR.

Easy solution by the looks of it! Your HFC might be causing the issue here.

Ask the dealer to do PUMA 62732575-01, after that retry if you have the issue.

Same thing happened to my car, the drivetrain needed to be re-calibrated and adjusted to your new set up.

MR

Thanks, I will tell them.

[twin fed]

So I haven't gone to the dealership again, but the light came on again yesterday. I was in 4th gear and accelerated (mildly) form 80 to 100 and BOOM! I had half a tank of gas and the temp was 74 deg. This is getting very frustrating. I have the info that MR. gave me but I am waiting to hit the 1200 mile mark to have my rear dif oil changed since I had the recall done. Hopefully that will fix this issue.

[FSociety]

Originally Posted by twin fed

So I haven't gone to the dealership again, but the light came on again yesterday. I was in 4th gear and accelerated (mildly) form 80 to 100 and BOOM! I had half a tank of gas and the temp was 74 deg. This is getting very frustrating. I have the info that MR. gave me but I am waiting to hit the 1200 mile mark to have my rear dif oil changed since I had the recall done. Hopefully that will fix this issue.

Do you have ISTA+ / Rheingold ?
You can plug in and read your car to see what is the underlying Fault Codes
Otherwise I would just take it to dealer let them diagnose

[twin fed]

Originally Posted by FSociety

Do you have ISTA+ / Rheingold ?
You can plug in and read your car to see what is the underlying Fault Codes
Otherwise I would just take it to dealer let them diagnose

BMW said that there are no specific fault codes. They see the warning when they scan the car but they don't know why it is happening, or what is causing it.

[geogerf]

Originally Posted by twin fed

I am waiting to hit the 1200 mile mark to have my rear dif oil changed since I had the recall done. Hopefully that will fix this issue.

Wait a sec, you're not past the break-in period?

[akkando]

Originally Posted by geogerf

Wait a sec, you're not past the break-in period?

Guess he has to do it twice because the had the rear diff replaced.

[twin fed]

Originally Posted by akkando

Guess he has to do it twice because the had the rear diff replaced.

That is correct. I had the rear diff replaced under a recall, so I have to bring it back to have the oil changed again.

[akkando]

Originally Posted by twin fed

That is correct. I had the rear diff replaced under a recall, so I have to bring it back to have the oil changed again.

I would just probably get everything back to stock again see if you can get the drivetrain error to happen. If you do then we learned it's likely nothing you have done with the car. If it doesn't happen, add back a piece at a time until you know what's causing the problem.

[twin fed]

Originally Posted by akkando

I would just probably get everything back to stock again see if you can get the drivetrain error to happen. If you do then we learned it's likely nothing you have done with the car. If it doesn't happen, add back a piece at a time until you know what's causing the problem.

The only thing that I have is the Fabspeed HFC. Many M2 owners have this mod and it has not affected them, plus it has been know to happen on completely stock cars.

[MR.]

Originally Posted by twin fed

The only thing that I have is the Fabspeed HFC. Many M2 owners have this mod and it has not affected them, plus it has been know to happen on completely stock cars.

Do the upgrade and try again... Bit by bit we will find it!

MR

[Twt]

Originally Posted by QM

Just a thought. Could it be fuel starvation? There's been a number of reports of fuel pump issues at the track with less than 1/4 tank at high rpm.

I had this issue and thought it was fuel related so:

[switlikbob]

Sorry some of that is cut off. What was your issue and fix? EKPS module (no idea what that is) was replaced, and that fixed voltage problem to the low pressure fuel pump?