Need help !!! Engine/eletrics problem (?) - The Unofficial BMW M5 Messageboard (m5board.com)

AFX · 1st July 2005, 05:15

Hi fellow Beast owners!!!

My first post here; sorry that's problem.
Bought myself my first '00 M5 in May; beatiful car, only 54.000 km. It is in excellent condition, LeMansBlue, combined Blue/Black leather interior +++ but without NAV (but I find my way around

anyway).

But after 2 weeks the car started to behave strange on cold engine. After a checkup at the local dealer; they found an error in the Exhaustgas Temp Sensor. BMW AG claims is should be removed as the part has been discontinued and there was an instruction for reprogramming of computer. This was done.

But the problem still persists, and the same errorcode now is in the comp again (error 79) (OBDII code P1490). Also a new error has occured. During a long drive 2 days ago, during a passing of another car, speed approx 130 km, 4.gear at 5500 rpm, the car "jumped" and went into emergency mode with max rpm at 3000. I had to stop and turn of the ignition. When I started it again, all was ok.
On the return, during a new passing (I just like to do that, understand why???) 4. gear, approx 5000 rpm, same **** happends again! Have to stop the car, turn of the ignition and everything is ok. I just freaked out! Also, imagine doing 140 km/h at 5-6000 rpm, and the engine suddently stops "working", understand how the car behaves physically. It "jumps".

Also, when this happend; I could for a split second notice that the DSC indicator flashing once on the dashboard just as the error occured.

After returning to my hometown, I went straight to the local dealer and had them read the computer, but no errors was registered this day (only the last error still remaining, that occured 2 days before, but after the last service).
They dont know what this is; how to fix it; or how to search for the error!

Understand my terrible situation, considering the car was bought only 6 weeks ago, and it's July, summertime and vacation in Norway...

Anyone have any tips, experienced any similar error with solution or, or, or ???
Hopefully there is a Beast-owner out there that can be my hero !

Praying a silent prayer that "you" exist out there...

Regards,
AFX

EDIT: After reading about MAF problems, I wonder... Hmmm...
Temp outside when this occured was about 10-12 degrees, showers with dry roads. Typically northern norway weather ... grmf... I also have scanned the docs from BMW AG and the doc from the tester (text from tester is in Swedish) and can email it (PDF format).

Kas28kbh · 29th December 2005, 12:20

HI!

INTERESTING!! My dad bought a 01 M5 black, 64.000km 6 months ago. It has the same problem! just around 160km/h cut of, emergency mode, stop engine, start everything is fine. We got the fuel pump replaced, but the problem id still there.... have you found a solution?

Our car only does it when it is given full throttle, and around 5-6000 rpm. never en 1st or 2nd. Only in 3rd, 4th, 5th and 6th gear. Full pedal, reach 5-5.000 rpm, cut off... every time.... BMW denmark cant find the problem...

you have a solution? The car is made for "racing", so this cant be an ok problem (as they claimed at BMW Denmark).

Would love to hear from you!

I can also be contacted by mail at kasperoestervig@gmail.com

Thanks!

Happy new year!

Quote:

Originally Posted by AFX

Hi fellow Beast owners!!!

My first post here; sorry that's problem.
Bought myself my first '00 M5 in May; beatiful car, only 54.000 km. It is in excellent condition, LeMansBlue, combined Blue/Black leather interior +++ but without NAV (but I find my way around

anyway).

But after 2 weeks the car started to behave strange on cold engine. After a checkup at the local dealer; they found an error in the Exhaustgas Temp Sensor. BMW AG claims is should be removed as the part has been discontinued and there was an instruction for reprogramming of computer. This was done.

But the problem still persists, and the same errorcode now is in the comp again (error 79) (OBDII code P1490). Also a new error has occured. During a long drive 2 days ago, during a passing of another car, speed approx 130 km, 4.gear at 5500 rpm, the car "jumped" and went into emergency mode with max rpm at 3000. I had to stop and turn of the ignition. When I started it again, all was ok.
On the return, during a new passing (I just like to do that, understand why???) 4. gear, approx 5000 rpm, same **** happends again! Have to stop the car, turn of the ignition and everything is ok. I just freaked out! Also, imagine doing 140 km/h at 5-6000 rpm, and the engine suddently stops "working", understand how the car behaves physically. It "jumps".

Also, when this happend; I could for a split second notice that the DSC indicator flashing once on the dashboard just as the error occured.

After returning to my hometown, I went straight to the local dealer and had them read the computer, but no errors was registered this day (only the last error still remaining, that occured 2 days before, but after the last service).
They dont know what this is; how to fix it; or how to search for the error!

Understand my terrible situation, considering the car was bought only 6 weeks ago, and it's July, summertime and vacation in Norway...

Anyone have any tips, experienced any similar error with solution or, or, or ???
Hopefully there is a Beast-owner out there that can be my hero !

Praying a silent prayer that "you" exist out there...

Regards,
AFX

EDIT: After reading about MAF problems, I wonder... Hmmm...
Temp outside when this occured was about 10-12 degrees, showers with dry roads. Typically northern norway weather ... grmf... I also have scanned the docs from BMW AG and the doc from the tester (text from tester is in Swedish) and can email it (PDF format).

Frits · 29th December 2005, 12:34

Try changing the MAFs. I had the same behavior with the cold engine, and a likewise problem with this 'emergency mode'. Changed the MAFs, and everything goes fine. Feels like driving a new car... Do a search on MAFs, and you'll find some info on ordering VW MAFs, which are a lot cheaper, and have the same part number. I'm running those, for about 5000 kms now, without any problem.

Kas28kbh · 31st December 2005, 11:06

Thanks!

A time has now been booked with BMW here in Copenhagen for chancing the Mafs! Excellent site! They have tried for 5 months at BMW to correct the problem! Thanx again!

Best regards
Kasper

Quote:

Originally Posted by Frits

Try changing the MAFs. I had the same behavior with the cold engine, and a likewise problem with this 'emergency mode'. Changed the MAFs, and everything goes fine. Feels like driving a new car... Do a search on MAFs, and you'll find some info on ordering VW MAFs, which are a lot cheaper, and have the same part number. I'm running those, for about 5000 kms now, without any problem.