Where to reset tcu hard limp mode in West LA
Thread Starter
Junior Member
Joined: May 2020
Posts: 28
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W211 E55
Where to reset tcu hard limp mode in West LA
2006 E55, I had an issue with my transmission shifting into neutral randomly which threw the car into limp mode giving speed sensor codes. I swapped out the transmission conductor plate and the limp mode still remains since it needs to be reset with star or an equivalent device. I just have obd and can't read the tcu, but I assume the speed sensor codes are still stored on the tcu preventing it from exiting limp mode from what I read online. I have called a whole bunch of places in my area and they say that this can't be done and the whole trans conductor plate needs to be reprogrammed which I seriously doubt since it is just a circuit board and doesn't store information. One place even said that it is a security part and he was surprised they sold them to people. None of the shops I wanted to even touch the car.
So my question is, where can I go to get the codes deleted so the car can exit limp mode?
Is there anything else that needs to be done besides clearing the tcu codes to exit limp mode?
So my question is, where can I go to get the codes deleted so the car can exit limp mode?
Is there anything else that needs to be done besides clearing the tcu codes to exit limp mode?
Super Member
Joined: Oct 2018
Posts: 699
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From: OC, CA
2006 E55
2006 E55, I had an issue with my transmission shifting into neutral randomly which threw the car into limp mode giving speed sensor codes. I swapped out the transmission conductor plate and the limp mode still remains since it needs to be reset with star or an equivalent device. I just have obd and can't read the tcu, but I assume the speed sensor codes are still stored on the tcu preventing it from exiting limp mode from what I read online. I have called a whole bunch of places in my area and they say that this can't be done and the whole trans conductor plate needs to be reprogrammed which I seriously doubt since it is just a circuit board and doesn't store information. One place even said that it is a security part and he was surprised they sold them to people. None of the shops I wanted to even touch the car.
So my question is, where can I go to get the codes deleted so the car can exit limp mode?
Is there anything else that needs to be done besides clearing the tcu codes to exit limp mode?
So my question is, where can I go to get the codes deleted so the car can exit limp mode?
Is there anything else that needs to be done besides clearing the tcu codes to exit limp mode?
Thread Starter
Junior Member
Joined: May 2020
Posts: 28
Likes: 1
W211 E55
Yea I tried that as well as clear with obd but it still won't come out of limp mode. From what I read, it is in hard limp mode and the only way is with star or an equivalent system
Last edited by Ramodeys; Oct 4, 2020 at 02:55 PM.
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From: Worldwide
2007 Mercedes E63 AMG
did you code the conductor plate to your vehicle? they need to be married. you'll need the correct system to do this. along with this, the technician should clear any codes with appropriate tool.
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From: Christchurch, New Zealand
CLS55
His car is (via the trans) in hard limp mode. Fixing the problem won't get the car out of limp mode alone, he also needs to get the transmission codes reset. I think since has replaced the conductor plate he can reset the code and get back on the road!
I experienced the same when i replaced my valvebody and conductor plate. the plate got damaged in shipping and the speed sensor was not operating correctly.
I experienced the same when i replaced my valvebody and conductor plate. the plate got damaged in shipping and the speed sensor was not operating correctly.
Thread Starter
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W211 E55
Thread Starter
Junior Member
Joined: May 2020
Posts: 28
Likes: 1
W211 E55
Got the rear and aux battery fully charged (still waiting on the new aux battery), but now it won't crank. Relay and fuse are good. Just one thing after another with this car. I'm gonna wait for the aux battery to come, but I doubt that has anything to do with the starter. The starter might just be dead.
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From: Republic of Texas
'99 and '05 E55 AMG
<sigh> Install relay switch in starter relay location in the front SAM. Turn ignition key to position one. Flip relay switch to on. Starter turns engine over, starter is good, problem is before the relay (key, EIS, ME). If you flip switch to on, starter does nothing, starter is bad.
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Start simple and then work your way up.
Search, search, search!
You are not the first to deal with this. Regard it as a learning experience.
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From: Florida
Too many german broads
