Transmission Range Sensor Circuit
Thread Starter
Newbie
Joined: Jan 2020
Posts: 4
Likes: 0
2012 C250 Sport
Transmission Range Sensor Circuit
I'm a do-it-yourselfer, and got the P0705 code. I've gone online and there isn't much info on this and how to remedy--seems like a lot of guesswork-loose wires, dead circuit, etc. Has anyone had to deal with this? If so, did you take it to a MB Service center or do it yourself?
Thanks,
Rob g
Thanks,
Rob g
Super Member
Joined: Jun 2017
Posts: 608
Likes: 107
From: Western NC
2009 MB C300 Sport 4matic
What Sx's do you have...limp mode, doesn't go into gear at all, etc.? Seems like the circuit board on the shifter assembly in the console is pointed to as the failed component in most cases..much less likely is the TCU/ECU themselves. I would pop the shifter off (see YouTube videos) and at least visually inspect connectors/board and clean with electronic spray. If it has failed a new one (not cheap) will need to be paired to your MB I believe by the Dealer.. Hope this helps a bit.
Thread Starter
Newbie
Joined: Jan 2020
Posts: 4
Likes: 0
2012 C250 Sport
What Sx's do you have...limp mode, doesn't go into gear at all, etc.? Seems like the circuit board on the shifter assembly in the console is pointed to as the failed component in most cases..much less likely is the TCU/ECU themselves. I would pop the shifter off (see YouTube videos) and at least visually inspect connectors/board and clean with electronic spray. If it has failed a new one (not cheap) will need to be paired to your MB I believe by the Dealer.. Hope this helps a bit.
Thanks for the reply.
Super Member
Joined: Jun 2017
Posts: 608
Likes: 107
From: Western NC
2009 MB C300 Sport 4matic
https://www.walmart.com/ip/CRC-5103-...xoCLvgQAvD_BwE
Got this at WalMart....can you clear the code and, if so, it comes back?
Got this at WalMart....can you clear the code and, if so, it comes back?
Newbie
Joined: Mar 2020
Posts: 11
Likes: 1
E350
I have the same error code on my 2012.... What is weird after I clear the code, it will not come back on unless I re-start the car within an hour of turning it off. Meaning I can drive to work, let it sit for hours, drive home and no code. However I can start with no code, run to the store go to start the car back up and get the code to trigger. Very weird.
Anyone know where I can find the part number for a 2012 C250 ?
Junior Member
Joined: Sep 2017
Posts: 39
Likes: 2
2011 W204 C180 GGI (FL)
Hi all, just wondering if the OP managed to resolve the issue?
My 2011 C180 CGI recently popped up a CEL, and upon diagnosis, dealer puled out codes P0705 (Selection range sensor A has an electrical fault) and P0606 (Component Y3/8N4 is faulty) and recommended replacing the "electrohydraulic transmission control unit". My car only has 46k kms on the clock and has been maintained religiously by the dealership.
The car drives fine, no jerks and no LIMP mode, and I am not really convinced on the need to replace the whole control unit, given my low mileage. Hoping its probably just a minor glitch somewhere. Regarding the shifter assembly circuit board as mentioned by Gamma300C - I understand there have been a few posts mentioning this in the W203 forums, and I was told the W204 with 722.9 boxes don't have such component - would you be able to confirm this?
Regards,
Mo420
My 2011 C180 CGI recently popped up a CEL, and upon diagnosis, dealer puled out codes P0705 (Selection range sensor A has an electrical fault) and P0606 (Component Y3/8N4 is faulty) and recommended replacing the "electrohydraulic transmission control unit". My car only has 46k kms on the clock and has been maintained religiously by the dealership.
The car drives fine, no jerks and no LIMP mode, and I am not really convinced on the need to replace the whole control unit, given my low mileage. Hoping its probably just a minor glitch somewhere. Regarding the shifter assembly circuit board as mentioned by Gamma300C - I understand there have been a few posts mentioning this in the W203 forums, and I was told the W204 with 722.9 boxes don't have such component - would you be able to confirm this?
Regards,
Mo420
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Joined: Aug 2013
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2012 C300 4MATIC Sport
Hi all, just wondering if the OP managed to resolve the issue?
My 2011 C180 CGI recently popped up a CEL, and upon diagnosis, dealer puled out codes P0705 (Selection range sensor A has an electrical fault) and P0606 (Component Y3/8N4 is faulty) and recommended replacing the "electrohydraulic transmission control unit". My car only has 46k kms on the clock and has been maintained religiously by the dealership.
The car drives fine, no jerks and no LIMP mode, and I am not really convinced on the need to replace the whole control unit, given my low mileage. Hoping its probably just a minor glitch somewhere. Regarding the shifter assembly circuit board as mentioned by Gamma300C - I understand there have been a few posts mentioning this in the W203 forums, and I was told the W204 with 722.9 boxes don't have such component - would you be able to confirm this?
Regards,
Mo420
My 2011 C180 CGI recently popped up a CEL, and upon diagnosis, dealer puled out codes P0705 (Selection range sensor A has an electrical fault) and P0606 (Component Y3/8N4 is faulty) and recommended replacing the "electrohydraulic transmission control unit". My car only has 46k kms on the clock and has been maintained religiously by the dealership.
The car drives fine, no jerks and no LIMP mode, and I am not really convinced on the need to replace the whole control unit, given my low mileage. Hoping its probably just a minor glitch somewhere. Regarding the shifter assembly circuit board as mentioned by Gamma300C - I understand there have been a few posts mentioning this in the W203 forums, and I was told the W204 with 722.9 boxes don't have such component - would you be able to confirm this?
Regards,
Mo420
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Newbie
Joined: Mar 2020
Posts: 11
Likes: 1
E350
Hi all, just wondering if the OP managed to resolve the issue?
My 2011 C180 CGI recently popped up a CEL, and upon diagnosis, dealer puled out codes P0705 (Selection range sensor A has an electrical fault) and P0606 (Component Y3/8N4 is faulty) and recommended replacing the "electrohydraulic transmission control unit". My car only has 46k kms on the clock and has been maintained religiously by the dealership.
The car drives fine, no jerks and no LIMP mode, and I am not really convinced on the need to replace the whole control unit, given my low mileage. Hoping its probably just a minor glitch somewhere. Regarding the shifter assembly circuit board as mentioned by Gamma300C - I understand there have been a few posts mentioning this in the W203 forums, and I was told the W204 with 722.9 boxes don't have such component - would you be able to confirm this?
Regards,
Mo420
My 2011 C180 CGI recently popped up a CEL, and upon diagnosis, dealer puled out codes P0705 (Selection range sensor A has an electrical fault) and P0606 (Component Y3/8N4 is faulty) and recommended replacing the "electrohydraulic transmission control unit". My car only has 46k kms on the clock and has been maintained religiously by the dealership.
The car drives fine, no jerks and no LIMP mode, and I am not really convinced on the need to replace the whole control unit, given my low mileage. Hoping its probably just a minor glitch somewhere. Regarding the shifter assembly circuit board as mentioned by Gamma300C - I understand there have been a few posts mentioning this in the W203 forums, and I was told the W204 with 722.9 boxes don't have such component - would you be able to confirm this?
Regards,
Mo420
https://circuitboardmedics.com/blog/...view-solution/
Junior Member
Joined: Sep 2017
Posts: 39
Likes: 2
2011 W204 C180 GGI (FL)
Junior Member
Joined: Sep 2017
Posts: 39
Likes: 2
2011 W204 C180 GGI (FL)
Hi there I just responded in the other thread as my fix was replacing the conductor plate. Take a look here and there is a lot of good info. Your other P0606 code is the TCU module which is part of the conductor plate.
https://circuitboardmedics.com/blog/...view-solution/
https://circuitboardmedics.com/blog/...view-solution/
For benefit of others, the other thread can be found here: https://mbworld.org/forums/c-class-w...ml#post8029794
Newbie
Joined: Feb 2024
Posts: 1
Likes: 0
C180 S204
Hi all, just wondering if the OP managed to resolve the issue?
My 2011 C180 CGI recently popped up a CEL, and upon diagnosis, dealer puled out codes P0705 (Selection range sensor A has an electrical fault) and P0606 (Component Y3/8N4 is faulty) and recommended replacing the "electrohydraulic transmission control unit". My car only has 46k kms on the clock and has been maintained religiously by the dealership.
The car drives fine, no jerks and no LIMP mode, and I am not really convinced on the need to replace the whole control unit, given my low mileage. Hoping its probably just a minor glitch somewhere. Regarding the shifter assembly circuit board as mentioned by Gamma300C - I understand there have been a few posts mentioning this in the W203 forums, and I was told the W204 with 722.9 boxes don't have such component - would you be able to confirm this?
Regards,
Mo420
My 2011 C180 CGI recently popped up a CEL, and upon diagnosis, dealer puled out codes P0705 (Selection range sensor A has an electrical fault) and P0606 (Component Y3/8N4 is faulty) and recommended replacing the "electrohydraulic transmission control unit". My car only has 46k kms on the clock and has been maintained religiously by the dealership.
The car drives fine, no jerks and no LIMP mode, and I am not really convinced on the need to replace the whole control unit, given my low mileage. Hoping its probably just a minor glitch somewhere. Regarding the shifter assembly circuit board as mentioned by Gamma300C - I understand there have been a few posts mentioning this in the W203 forums, and I was told the W204 with 722.9 boxes don't have such component - would you be able to confirm this?
Regards,
Mo420
I have the very same issue as you. Exact same two codes. No problems driving. Just wondering what your specific fix was please?
Thanks!
Joined: Nov 2016
Posts: 7,847
Likes: 3,499
From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Newbie
Joined: Jan 2018
Posts: 6
Likes: 0
From: West Virginia
07 C280 4M/19 Hyundai Ioniq PHEV
W203 P0705 transmission range sensor.
Good afternoon everyone; pretty old post, but I definitely find it appropriate that I comment on this issue.
I just recently purchased a 2007 W203 with a 722.6. While during the first test drive, the car was stuck in gear and was in limp home mode. Unable to go from D to P only D to N unless the engine was shut off. I was assuming a conductor plate. (Came back later with the person having the car idle for a while to charge up the battery.) That test drive was perfect.
After purchasing the vehicle, as soon as I left the location of purchase... Stuck in gear limp home mode. (Same story, can't go into P with the engine running)
Finally after pulling off shortly to fill up, drove fine.
Mile down the road, limp mode again.
Pulled over and tried 3 times cycling the ignition off and on to get the D back in the display.
No avail.
Pulled out my OBD reader and saw it was not a speed sensor like I was expecting but P0705.
After parking it and trying again, everything seemed fine. Just stuck with a CEL that went away after a day of driving.
Battery is testing amazing under load. (Had to test to be sure)
Have the issue again. It's not the conductor plate. Is the shift selection delphi control part.
I made sure my TCM was bone dry. With the issues I'm seeing, it's definitely the sensor having issues.
Crossing fingers my reflow of solder will be the solution. That and cleaning the sensors on the board.
I may make a video, though all credit will go the the creator in Indonesia.
I just recently purchased a 2007 W203 with a 722.6. While during the first test drive, the car was stuck in gear and was in limp home mode. Unable to go from D to P only D to N unless the engine was shut off. I was assuming a conductor plate. (Came back later with the person having the car idle for a while to charge up the battery.) That test drive was perfect.
After purchasing the vehicle, as soon as I left the location of purchase... Stuck in gear limp home mode. (Same story, can't go into P with the engine running)
Finally after pulling off shortly to fill up, drove fine.
Mile down the road, limp mode again.
Pulled over and tried 3 times cycling the ignition off and on to get the D back in the display.
No avail.
Pulled out my OBD reader and saw it was not a speed sensor like I was expecting but P0705.
After parking it and trying again, everything seemed fine. Just stuck with a CEL that went away after a day of driving.
Battery is testing amazing under load. (Had to test to be sure)
Have the issue again. It's not the conductor plate. Is the shift selection delphi control part.
I made sure my TCM was bone dry. With the issues I'm seeing, it's definitely the sensor having issues.
Crossing fingers my reflow of solder will be the solution. That and cleaning the sensors on the board.
I may make a video, though all credit will go the the creator in Indonesia.
Last edited by dunca123; May 17, 2024 at 08:18 PM.
Newbie
Joined: Jan 2018
Posts: 6
Likes: 0
From: West Virginia
07 C280 4M/19 Hyundai Ioniq PHEV
Bite the bullet...
Well I Fudged up while attempting to repair the Delphi component.
Removing the component, I broke a tab that slots into the shift rod.
I glued it back in place... As for the solder re-flow. I was using my fine tip and I believe I knicked a top edge of one of the sensors while reflowing a pad.
Now, is reading P and R but definitely messed up N and D.
If you attempt this component level fix, definitely need a finer tip than what I used and a microscope setup.
Removing the component, I broke a tab that slots into the shift rod.
I glued it back in place... As for the solder re-flow. I was using my fine tip and I believe I knicked a top edge of one of the sensors while reflowing a pad.
Now, is reading P and R but definitely messed up N and D.
If you attempt this component level fix, definitely need a finer tip than what I used and a microscope setup.
Newbie
Joined: Jan 2018
Posts: 6
Likes: 0
From: West Virginia
07 C280 4M/19 Hyundai Ioniq PHEV
Glue failed. Piece broke off. One notch is not enough.
Random location given to the based off speed of gear shift.
Annoying mess up on my part. Removing the assembly inside the shifter without damage is my bad. It's a one way clip.
To remove it safely, you must remove the entire gear selector shaft.
Random location given to the based off speed of gear shift.
Annoying mess up on my part. Removing the assembly inside the shifter without damage is my bad. It's a one way clip.
To remove it safely, you must remove the entire gear selector shaft.
