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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 09-04-2012, 04:23 PM   #41
acon
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Join Date: May 2004
Location: Florida
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My Ride: 2004 325I 4-DR
New bump as well. Can anybody please provide some guidance/insight on where is the auto gear selector module connector located so I can clean the contacts? I'm having the same problems with the (!) indicator coming on and off on my 04 325i automatic. Car shifts gears fine, battery measures fine and is about 1 1/2 years old. Indie mechanic thought it was the alternator so he swaped it out but still got a light so he swaped the old one back in ando replaced the back stop light, but doesn't know what this is. I replaced the voltage regulator on the altenator a couple of months ago but never got the light. Only aftermarket is angel eyes but I've had this for 4 years and they've never given my an issue. Thanks!
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Old 09-05-2012, 09:00 PM   #42
ozzied
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Quote:
Originally Posted by acon View Post
New bump as well. Can anybody please provide some guidance/insight on where is the auto gear selector module connector located so I can clean the contacts? I'm having the same problems with the (!) indicator coming on and off on my 04 325i automatic. Car shifts gears fine, battery measures fine and is about 1 1/2 years old. Indie mechanic thought it was the alternator so he swaped it out but still got a light so he swaped the old one back in ando replaced the back stop light, but doesn't know what this is. I replaced the voltage regulator on the altenator a couple of months ago but never got the light. Only aftermarket is angel eyes but I've had this for 4 years and they've never given my an issue. Thanks!
Very similar problem - my 2004 BMW325i goes into transmission failsafe mode sporadically. Error codes EGS 21 and 91. Happens to my wife but the local mechanic cant replicate it at all. So frustrating.

I have come to despise this car. Paid $12K for it last year; have had $3K in service done; local repair/sales guy said he could wholesale it and get $6K for it at most.
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Old 09-11-2012, 10:10 PM   #43
maw1124
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My Ride: Allroad; S55; 500E
There's a trans sensor plug that goes bad on these, just like on the Mercedes W220's. It was failing on my car and the selling dealer fixed it for free. But those codes are well known (I googled it standing in front of him to confirm the diagnosis). Less than $100 bucks and a quick fix. If no dealer can figure this out, suggest it to them.

Good luck.

maw
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Old 11-05-2012, 12:10 PM   #44
acon
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Originally Posted by maw1124 View Post
There's a trans sensor plug that goes bad on these, just like on the Mercedes W220's. It was failing on my car and the selling dealer fixed it for free. But those codes are well known (I googled it standing in front of him to confirm the diagnosis). Less than $100 bucks and a quick fix. If no dealer can figure this out, suggest it to them.

Good luck.

maw
I'm willing to try that. Do you know if this is the same part as listed on Pelican:
http://www.pelicanparts.com/catalog/...TRANSM_pg4.htm

If it's not difficult I might DIY it. At this point I want to clear this code for good without spending too much $ and sell the car!

Thanks!

Last edited by acon; 11-05-2012 at 09:45 PM.
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Old 11-07-2012, 07:34 AM   #45
maw1124
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Originally Posted by acon View Post
I'm willing to try that. Do you know if this is the same part as listed on Pelican:
http://www.pelicanparts.com/catalog/...TRANSM_pg4.htm

If it's not difficult I might DIY it. At this point I want to clear this code for good without spending too much $ and sell the car!

Thanks!
It's a "gear position sensor" that mounts at the back of the SMG transmission. Be sure to confirm the diagnosis before you throw parts at it. Good luck.

Cheers,

maw
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Old 11-07-2012, 07:57 AM   #46
gusmagoo
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Ok Iím having similar intermittent appearance of limp mode warning Iím fortunate enough to have the DIS software that BMW use so have pulled the fault code which was P0705 the ďneutral position sensorĒ

My diagnostics told me to first check all lines and connections (presumably because itís intermittent rather than constant) and if that doesnít fix it then consider replacing the switch... Itís attached to the nearside of the transmission but you need to remove the sump to remove it. The part number (for my car at least) is 24107507818 and can be seen as number 9 on the diagram here.

http://www.realoem.com/bmw/showparts...87&hg=24&fg=15

Thatís assuming this is the part youíre on about and itís just less than $300. If you have a different transmission you should be able to pinpoint the switch using the realoem search function. Please keep us posted!!! (as my other post asks!)
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Old 03-08-2013, 04:54 PM   #47
HMBavaria
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man, i have the same light on, mine is due to maf sensor,causing throttle position sensor code on.bmr shop says its has to do with emission and car drives amazing. no issues
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Old 07-04-2013, 04:14 PM   #48
Randallwayne
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I had my windshield replaced and while driving home the light on dash came on and car went into limp mode. Is there anything in the windshield area that could have gotten broken or unplugged that would cause this? thanks.
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Old 08-09-2013, 04:34 AM   #49
ridgefield
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Auto transmission safe mode

I have had this problem for a while, sometimes on start up it goes in to transmission safe mode. Switch off then on again and it goes away. Also had rough idle one morning. Took it to the BMW agents and give them their due they did a thorough check. Turns out its a faulty transmission position switch part 241 075 07818 and a faulty exhaust cam sensor part 121 475 18628. They tell me somehow these are related in their operation. I will have these changed though they tell me there is up to a 6 week wait to get the position switch in stock.
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Old 08-09-2013, 09:54 PM   #50
Rezist09
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I'm having a problem with mine code P0720 Output Speed Sensor Circuit Malfunction
Changed out the output speed sensor car stayed the same it won't move stuck on limp mode also when trying to drive car revs at 2k takes a while to catch up to speed? Maybe input speed sensor? What other cause can it be?
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Old 08-10-2013, 02:43 AM   #51
ridgefield
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Have you checked your battery?
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Old 11-24-2013, 06:41 AM   #52
gusmagoo
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Quote:
Originally Posted by gusmagoo View Post
Ok Iím having similar intermittent appearance of limp mode warning Iím fortunate enough to have the DIS software that BMW use so have pulled the fault code which was P0705 the ďneutral position sensorĒ

My diagnostics told me to first check all lines and connections (presumably because itís intermittent rather than constant) and if that doesnít fix it then consider replacing the switch... Itís attached to the nearside of the transmission but you need to remove the sump to remove it. The part number (for my car at least) is 24107507818 and can be seen as number 9 on the diagram here.

http://www.realoem.com/bmw/showparts...87&hg=24&fg=15

Thatís assuming this is the part youíre on about and itís just less than $300. If you have a different transmission you should be able to pinpoint the switch using the realoem search function. Please keep us posted!!! (as my other post asks!)
Just thought I'd correct my own post here! You DON'T have to remove the sump to replace this switch . It has been done and solved my issues. Job done...
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Old 01-02-2014, 05:46 AM   #53
jf_cole
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Cheers Gusmagoo. Found your post through google.

Having been having a similar problem with with an E59 520i Auto. Symptoms seem idential to you. Waiting on Diag cable to check codes, but seems like the same issue. Going to have the part inspected first, then will probably replace.
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Old 01-02-2014, 06:43 AM   #54
RayPooley
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Originally Posted by tradingflare View Post
It's your transmission light...what on God's green earth that has to do with your cd player, only $205.64 will know.
I suspect they wanted to return the CD to factory spec to eliminate the possibility of wiring faults introduced by installing non OEM player.
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Old 01-04-2014, 05:30 AM   #55
gusmagoo
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Originally Posted by jf_cole View Post
Cheers Gusmagoo. Found your post through google.

Having been having a similar problem with with an E59 520i Auto. Symptoms seem idential to you. Waiting on Diag cable to check codes, but seems like the same issue. Going to have the part inspected first, then will probably replace.
No problem, glad to help out. I have since sold my coupe and gone back to a Merc estate (for practical reasons) I have the BM Tecnic cable, disc and printed instructions knocking about somewhere if anyone is interested? I think I payed 30 quid or something for the kit? i believe they have gone out of business but the kit worked great for me and i changed my passenger mirror to tilt down when reversing! Awesome bit of kit. (as well as reading and clearing all my fault codes)
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Old 11-02-2016, 03:53 PM   #56
kcbravo
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Solution to Transmission light On/Off

I know this is an old thread but I still believe it is still relevant. I posting this to share my discovery with all Bmw steptronic fanatics. After my extensive research I must say have become an instructor or a workshop foreman! I have discovered that the steptronic engines particularly the e46 330i are the least problematic with regards to resolving issues related to the Gearbox light. I have been one of the affected 330i owners until I stumbled on the info I am going to share with you. Ladies and gentlemen the main cause of the gearbox light is a failing cooling system! Autoboxes have an oil cooler which is complimented with a tiny thermostat, about the size of a nail polish bottle. That thermostat is the culprit that cause the gearbox light to show up if it is not functioning correctly. It is located under the expansion tank on the bracket that holds the expansion tank to the radiator. Most of the mechanics overlook this unit when replacing the expansion tanks or radiator. Forget about changing oil first because the problem will still be there if this little bad boy is not taken care of. It's main job is to regulate the temperature of water that goes to the gearbox oil cooler. Unfortunately due to sediments and residue from antifreeze and normal water this part gets clogged, resulting in sever headaches for the owner of an automatic Bmw 330i.
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Old 11-03-2016, 03:17 AM   #57
BiH55
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Originally Posted by ridgefield View Post
Have you checked your battery?
So many online mechanics
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Old 11-03-2016, 03:24 AM   #58
kcbravo
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Originally Posted by auto feature View Post
Here is what happen to me yesterday. My transmission light came on in red, the car started to behave as if the wants to stall when i'm coming to a stop, then the transmission changes out with a kick. I parked the car for the rest of the day, this morning i start the car and the light is off, haven't driven it yet to see if the symtoms still exist. I did a voltage test and the battery is fine, i have'nt install any after market stuff. Only i replaced about a month ago was my MAF sensor which is dealer baught. I'm going to have a scan done to see what codes are showing.


Under your expansion tank is a little thermostat which is responsible for regulating the temperature of your automatic transmission. Have a look at it and you might be shocked by what you'll see. Due to high temps this babies become bristle and clogged. They are the number one cause of gearbox light and limp mode. On the highway your car will drive normal but your fuel consumption will be slightly high if this thermostat is defective. Once you get to heavy traffic then it lights up again and your car goes limp. Please have a look. I will post part number as I am unable to post pictures.
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Old 11-03-2016, 10:08 PM   #59
tbuck
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Interesting and timely. I'm dealing with an engine that ran hot and is in limp mode. I'll give this a look.
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Old 11-04-2016, 02:33 AM   #60
kcbravo
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Originally Posted by tbuck View Post
Interesting and timely. I'm dealing with an engine that ran hot and is in limp mode. I'll give this a look.
https://www.ecstuning.com/BMW-E46-330i-M54_3.0L/Drivetrain/Automatic_Transmission/Oil_Cooler/

Have a look! Part number: 17111437362
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