Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)

7 Series - E38 (1995 - 2001)

Reply
 
Thread Tools Display Modes
  #1  
Old 11-06-2015, 09:05 AM
Selina007 Selina007 is offline
Registered User
Location: Atlantic City, NJ
 
Join Date: Oct 2011
Posts: 22
Mein Auto: 2001 740iL
Trans FailSafe error - 2001 740iL

Please help!!!
2001 740 iL with 240,000 miles

My car started with the Trans Fail Safe error yesterday, 11/5/15. I have had the ABS/Brake and Traction control lights on for over a year now and read that this may cause a Trans Fail Safe error. However, over a year ago BMW told me these are on because the brake control module is bad but if not replaced won't really effect anything except traction control. I never replaced it because BMW wants $3,500 and up to do so. The problems I'm experiencing since the Trans Fail Safe message came up yesterday is as follows:

When Trans Fail Safe error comes up the car is taking longer to accelerate and the check engine light comes on
When the Trans Fail Safe error goes out the check engine light goes out also but the gauges stop working and my radiator gauge goes all the way to hot, but there's no problems with the cooling system/no overheating problems.
When the Trans Fail Safe error comes back on the check engine light comes on too and the gauges start working again but then there's the acceleration issue

I took it to a mechanic thinking I was loosing trans fluid. They checked it out, put it on the computer and said they cleared all errors to see if that would fix it and to see if they come up again. I mentioned to them about what I read concerning the ABS module being bad and being the cause for the Trans Fail Safe error and they didn't agree and said it is probably a wiring issue. I have the car scheduled for a diagnosis this coming Wednesday. They're telling me I'm looking at at least $180 to just diagnose. I'd rather avoid this cost if it could be something I can determine on my own. Please help and if you need any other information please let me know.

Last edited by Selina007; 11-06-2015 at 09:06 AM.
Reply With Quote
Advertisement
  #2  
Old 11-06-2015, 09:46 AM
sealbeach740 sealbeach740 is offline
Officially Welcomed to the 'Fest
Location: Seal Beach, CA.
 
Join Date: Sep 2003
Posts: 798
Mein Auto: 2000 740iS, 2003 540iS
Just to be sure, most TFS errors are caused by a low battery condition.
So, to answer your question, before spending the $180 for a diagnosis, I'd vote to get your battery checked out (usually free at your local auto parts store).
__________________

2000 740iS. MKIV, 16x9, DDEs controlled by Euro fog light switch, reversed steptronic +/- pattern, paddle shifters, clear corners, Basslink, iPod video with stereo audio, TV tuner, gauge rings, ///M pedals, backup camera with 'on demand' switch, quad brake lights, Dinan engine & tranny software, windows/sunroof close via remote.

2003 540iS. MKIV, 16x9, PDC, CWP, TV tuner, backup camera with 'on demand' switch, paddle shifters, windows/sunroof close via remote, iPod video & audio.
Reply With Quote
  #3  
Old 11-06-2015, 11:04 AM
Selina007 Selina007 is offline
Registered User
Location: Atlantic City, NJ
 
Join Date: Oct 2011
Posts: 22
Mein Auto: 2001 740iL
Thanks for replying

I will have the battery tested this afternoon. What results of the battery test am I looking for? If the results came back normal what else could be causing this issue?
Reply With Quote
  #4  
Old 11-06-2015, 02:55 PM
u.nanimous u.nanimous is offline
Certifiable BMW Whackjob!
Location: SE Michigan
 
Join Date: Oct 2014
Posts: 1,443
Mein Auto: 1999 740iS, 2001 330xi
Nothing like resurrecting an old thread and then 15 minutes later starting a new one for the same thing...sarcasm is free.

Auto-parts stores can load test the battery and will either say it is good or it is bad. The test is a little better than reading the OBC (test #7; ~12V car off, 13-14V running with foot on the gas).

There is a thread (E39 forum IIRC) by Bluebee that has a huge amount of testing information regarding the trifecta (ABS/DSC/Brakes). Typically this doesn't throw a TFS but with the other issues you've described it sounds like the rear drivers side wheel speed sensor so it might be worth a try if your battery checks out OK. You could go through the diagnostics or just swap your rear wheel speed sensors (left to right) and see if anything changes.
__________________
Before...

After...(this may take a few years, it's my DD and I have bigger projects)

2005 Venture Extended LT - what else you gonna drive when you have 6 kids, cargo and still want better than 10MPG
2000 Impala LS - because you need something to beat the snot out of in a Michigan winter
1999 BMW 740i - why do I have Chevy's again?
2001 BMW 330xi - father/son project time!
Reply With Quote
  #5  
Old 11-06-2015, 03:18 PM
Mayorchuck Mayorchuck is offline
Officially Welcomed to the 'Fest
Location: Farley, MO
 
Join Date: May 2013
Posts: 1,150
Mein Auto: '96 740iL
http://www.bimmerfest.com/forums/showpost.php?p=4205801

Reply With Quote
Reply

See More Related BMW Stories

Tags
2001 740il, abs control module, trans failsafe message


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Forum Jump


All times are GMT -7. The time now is 08:20 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms