Login|Contact Us
Question and Answer

BMW

Ask a BMW Question, Get an Answer ASAP!

  • Ask A Question
  • Browse Answers
  • Meet The Experts
  • How JustAnswer Works

My 1999 740 iL BMW transmission failure diagnosis light came on.

 
Steve's Avatar
  • Answered by:Steve
  • BMW Expert
  • Positive Feedback: 98.0 %
  • Accepted Answers: 14509
Verified Expert
in BMW

Recent Feedback

Positive
He ask me to rate him Excellent.
Positive
Excellent
Positive
Thank you. I thought that was it but wanted to be certain
Positive
just needed confirmation
Positive
I believe it's a reasonable AND rational answer. I'll be glad to tip once I have...
Positive
Good
Positive
Fixed the problem
Positive
Appreciate the honesty.

Customer Question

My 1999 740 iL BMW transmission failure diagnosis light came on.

 

Country: United States
Make: BMW
Model: 740iL
Year: 1999

Already Tried:
I drove it back home. It starts off slow, but I had no problem going about 40 mph.

Submitted: 585 days and 19 hours ago.
Category: BMW
Value: $38
Status: CLOSED

Accepted Answer

Picture
Expert:  Steve replied 585 days and 19 hours ago.

*

*

*

PLEASE NOTE THAT YOU MUST PRESS ACCEPT TO COMPLETE YOUR TRANSACTION AND CREDIT YOUR EXPERT

 

.

 

JUSTANSWER IS AN HONOR SYSTEM AND THE ACCEPT BUTTON MUST BE PRESSED TO CREDIT YOUR EXPERT

 

.

 

EVEN IF YOU ARE ON A SUBSCRIPTION WITH UNLIMITED QUESTIONS YOU MUST STILL PRESS ACCEPT

 

THANK YOU

*

*

*

*

 

 

 

 

Before reading my answer below, please note that you must press the green ACCEPT button in order for me to receive credit for my time and effort. Thank you.

 

 

 

 

 

 

Hello and welcome to JustAnswer BMW,

My name is XXXXX XXXXX it will be my pleasure to assist you today.

 

Transmission failsafe occurs when the transmission senses a fault or is missing a needed input that is required for proper operation. Transmission failsafe can occur for many, many reasons. It can be caused by a physical / mechanical problem, can be computer related, or can be a communication problem. Anything from a simple low fluid level or failed sensor to complete transmission failure can cause failsafe. Even a missing input from the ABS system or a failing alternator can cause failsafe, etc, etc, etc.

 

When the car is in failsafe, it locks into 3rd gear - this is why it starts out slow, because you are starting in 3rd instead of 1st gear.

 

The only way to determine why the transmission is in failsafe is to have the fault memory read out using a BMW compatible scan tool. Once the fault memory is read, the problem can be identified, and the issue fixed.

 

Without knowing what faults are stored, all a person can do is guess at the problem - which can get very expensive, very quickly.

 

You can always try to unhook the battery for an hour to see if the warning will go away, but even if it does, it will only be a matter of time until it comes back - it will keep coming back until the underlying fault is resolved.

 

You can also reset the transmission by turning the key to position 2 (all the way without starting the car) and pushing the accelerator pedal to the floor for 2min. This may or may not work, and again, the fault will likely return though until the underlying issue is addressed.

 

At this point, you can try the above as temporary fixes, but ultimately you will need to take the vehicle to a shop that has the proper equipment to read the faults so that the issue can be determined. There is no other way to resolve failsafe.

 

I hope that is helpful, please let me know if you have further questions, or if I can clarify anything for you.


It has been my pleasure to help today and I wish you the best of luck with your purchase.


If satisfied with my assistance, please press the green "ACCEPT" button so that I may be credited for helping today. I am not credited or compensated whatsoever until you press the green ACCEPT button.

 

>>>>>PLEASE DO NOT FORGET TO PRESS ACCEPT <<<<<

 

thank you in advance.

 

Steve

 

Expert TypeBMW Expert
Category: BMW
Pos. Feedback: 98.0 %
Accepts: 14509
Answered: 9/6/2011

Experience: BMW Expert

Ask this Expert a Question >
 
Tweet

6 BMW Mechanics are Online Right Now

Ask Your Question Now
Bmw Questions Date Submitted
318 IS: there is no voltage on the lambda sensor on my 1998 3/28/2013
2003 BMW 745Li Vin# XXXXX What are the battery 3/28/2013
e60 m5 3/28/2013
530Xi: 2007 530xi 75000 miles (kept in inside garage) It 3/28/2013
325i: I have a 04 bmw 325i. I've replace the value cover gasket 3/28/2013
BMW 530i: Trouble shooting BMW 530i v8 3/27/2013
745li: We've been presented with an offer to purchase a 2003 3/27/2013
328i: 2007 BMW 328i - N52k- Automatic - 94k Miles.DTC code 3/27/2013
740I: i want to replace the oxygen sensors on my 2001 bmw 740i 3/27/2013
Ra-Sjb 3/26/2013
RSS
Next 10 >
Ask A BMW Mechanic
Type Your BMW Question Here...
characters left:

Top BMW Experts

See More BMW Mechanics

In The News

Nbc
Washington Post
New York Times
Cnn
Learn More

How It Works

  • Ask an Expert
  • Get a Professional Answer
  • Ask Followup Questions
  • 100% Satisfaction Guarantee
Learn More
close
Find Expert answers related to your question.
Sign up using email
We will never post anything without your permission.
Already have an account? Sign in

Ask a BMW Mechanic

Get a Professional Answer. 100% Satisfaction Guaranteed.
229 BMW Mechanics are Online Now
Type Your BMW Question Here...
characters left:
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.
Truste
Contact Us | Terms of Service | Privacy & Security | About Us
© 2003-2013 JustAnswer LLC