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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 04-27-2013, 12:36 AM   #1
kiwi99wayne
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Join Date: Jan 2011
Location: Wellington NZ
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My Ride: 2001 320D
Transmission defaults to Limp Home Mode

I have a 320D but problem with my sister's 2003 325. Several times over last few months auto transmission has gone into limp home mode. Virtually no acceleration from standing or traction up a hill. No warning lights come up. She took to transmission specialist who reset computer. Been in three times and a different code has cme up each time. First time an overheating sensor was replaced and full clean up and inspection, nothing wrong. Last two times just reset computer. Unfortunately she does not have a record of the codes. Last event two weeks ago and she concerned it will happen again and be stranded. Any thoughts?
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Old 04-27-2013, 03:06 AM   #2
jjrichar
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Location: Australia
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This advice is for a 5HP19 transmission, which I'm assuming is in the car in question. If not, ignore.

When in limp mode, the transmission is stuck in 4th when D is selected, so this is why the car accelerates so poorly. This is normal for limp mode.

Sounds a bit strange that a different code is being given each time.

First two things I would do are:
1. Check the fluid level is correct. There a loads of good DIYs on this site for this. Low fluid can cause a bunch of different issues.
If the fluid level is ok,
2. Unplug and clean both plugs that go to the transmission. The one at the back is for control of the transmission, and the front one is telling the car what gear is selected. Could be either.

Tip for your sister, when she goes to get the codes checked, get a print out and stick is somewhere safe in the car. This info is essential for diagnosis. Without it, you are just stabbing in the dark.
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Old 04-30-2013, 04:04 AM   #3
kiwi99wayne
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Many thanks, will check and if still a problem will get codes before posting again.
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Old 05-07-2013, 01:10 AM   #4
kiwi99wayne
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The Bmer problem which has recurred. I can confirm the transmission is a 5HP19 and the fluid level is correct, its been drained twice since February over this same problem.
The mystery code as confirmed today by a BMW dealer is (059) 3B P0720 Stall speed, combined with an 065, Gear Monitoring 4th which is the limp home programme.
Thoughts?
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Old 08-21-2013, 04:44 AM   #5
ridgefield
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I have had this problem on start up it goes in to transmission limp mode with the gear warning on. 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 got them to change the cam sensor. My fuel consumption went done by around 30% and low down power improved considerably. Will get the position switch changed next.
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Old 08-22-2013, 10:38 PM   #6
chorizo
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did you get this solved ???
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Originally Posted by rjhibbard View Post
can i swap a 3.0 out of a bmw 2002 325 into a 1997 528 series
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Old 08-23-2013, 12:47 PM   #7
ridgefield
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After the Cam Sensor was fitted the gear limp mode has only come back once. I will see if it becomes problematic as it only occurs at start up and not while driving. The gear position sensor is not cheap and if I can avoid having it fitted I will, but if it comes on while driving then I will get it done. So that is where I am at the moment.
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Old 10-23-2013, 10:43 AM   #8
ridgefield
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I had the gear position switch fitted and have since done around a 1000km with no problems. So I think this is now sorted out.
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