Thank you, thank you, thank you!! Your tip on resetting the limp mode by using the accelerator button, waiting 2 mins then restarting WORKED!! I am beside myself with joy! I have been asking people, mechanics, everyone, and no-one likes Mercedes to work on so no-one could or would help. I was in despair that this car would never be fixed. This simple fix you have described is magic! Cost me nothing and I have my car back after months of no car and thinking it would have to go to the wrecker. THANK YOU!❤❤
We are glad it worked! If you have problems again, however (like we did), then keep watching the other videos. There is so much more to this issue. We got a computer to reset the transmission since one day simple fixes quit working. Later, we changed the transmission conductor plate, but it didn't help (big messy job). After that, we found out what was really causing it (hint, it had nothing to do with the transmission, but more to do with my long legs pressing on the floorboard where the transmission controller is, causing it to reset into limp mode). Thanks! Paul & Diane 😎😊
You two have a very cool, friendly, down-to-earth vibe, that makes watching your videos interesting and fun. I love your enthusiasm for learning how to fix your cars and sharing it with us. I've never owned a Mercedes, so I am learning a lot too from you. Good stuff! Thanks for sharing!
I was able to take my 2019 C43 out of limp mode instantly by using an OBD scanner. I even stopped getting burbles and pops as it would normally do. I had done multiple ECU resets and it had no effect. My car drives the same now as when I first bought it. Perfect, smooth shifts and Comfort mode is so powerful.
Wow, that’s great. I wish the OBD scanner was the solution for us as that was in the first thing we tried after we had the problem. We went through so much as you’ll see in later videos but eventually we did figure out what was causing it and It was completely unexpected. Diane & Paul 😁😎
Code P0715 is triggered when the Engine Control Module (ECM) or Transmission Control Module (TCM) detects an irregular signal coming from the input/turbine speed sensor in the transmission. The input/turbine speed sensor is used to measure how many revolutions per minute (RPM) the input shaft of the transmission is turning. It is usually a three-wire sensor that reads a reluctor ring in the transmission. When this code is triggered, the vehicle will most likely go into “fail-safe” mode, which is a condition where the vehicle’s power and speed are limited to minimize damage to other components. The ECM/TCM does this because they don’t know how fast the transmission is spinning, and cannot safely select which gear to shift into.
Thanks Mike, We can't wait to see what you think about our next video, out tomorrow, May 12th, which shows us trying to change the conductor plate. You must be a transmission guy so we will be interested if we made any wrong decisions with the many problems we had doing it. Thanks, Paul
I was wondering if you disconnect the battery and leave it like that for 30 minutes to reset to factory... But then doing that it will reset the whole thing
Since this video we have resolved the problem (in a future video) and now we know that the "learn mode" steps really work, but they don't reset a x-mission in "limp mode," so it is too late to try your idea. I wish we had tried it at the time... Diane & Paul
@@carzombies You can reset the fault code with your scan tool. That should clear the fault. Then you can see if the same fault comes back and how quickly.
@@MikeM-cz5ln We tried that with the original diagnostic tool and it just didn't have the muscle for it. So we bought a better tool that should have worked and it didn't either (we'll discuss in the next video). We did eventually figure out how to reset the TCM, but it wasn't obvious. It seems like I spend all my free time editing videos nowadays. Can't wait to show you the outcome. Thanks for hanging on, Paul
P0715 Causes There are many potential causes of code P0715. Failed input/turbine speed sensor Failed output speed sensor Failed torque converter Faulty wiring Debris on input/turbine speed sensor Debris on output speed sensor Damaged reluctor ring for input/turbine speed sensor
@@carzombies Paul, I actually found this info on the Internet and it makes sense pertaining to the problems you are experiencing. It would be great if your scan tool can graph the data received from the turbine speed sensor. Anyways, I'll bet the sensor is easy to access. I would at least pull the connector off and visually inspect the terminals for corrosion. Maybe check the resistance of the sensor with an ohmmeter to see if it is in spec.
@@MikeM-cz5ln I think we found the problem. Please stay tune to see what it is, it may be a couple of weeks before I have the video edited and posted, but it wasn't the speed sensor, it was something else tangentially related. Paul
Thank you, thank you, thank you!! Your tip on resetting the limp mode by using the accelerator button, waiting 2 mins then restarting WORKED!! I am beside myself with joy! I have been asking people, mechanics, everyone, and no-one likes Mercedes to work on so no-one could or would help. I was in despair that this car would never be fixed. This simple fix you have described is magic! Cost me nothing and I have my car back after months of no car and thinking it would have to go to the wrecker. THANK YOU!❤❤
We are glad it worked! If you have problems again, however (like we did), then keep watching the other videos. There is so much more to this issue. We got a computer to reset the transmission since one day simple fixes quit working. Later, we changed the transmission conductor plate, but it didn't help (big messy job). After that, we found out what was really causing it (hint, it had nothing to do with the transmission, but more to do with my long legs pressing on the floorboard where the transmission controller is, causing it to reset into limp mode).
Thanks!
Paul & Diane 😎😊
You two have a very cool, friendly, down-to-earth vibe, that makes watching your videos interesting and fun. I love your enthusiasm for learning how to fix your cars and sharing it with us. I've never owned a Mercedes, so I am learning a lot too from you. Good stuff! Thanks for sharing!
Thanks for watching!
Diane & Paul
0:24 you know everyone is giggling 😂😂😂
OMG you are soooo right!
(I'm renaming the video.)
Thanks
Paul
I was able to take my 2019 C43 out of limp mode instantly by using an OBD scanner. I even stopped getting burbles and pops as it would normally do. I had done multiple ECU resets and it had no effect. My car drives the same now as when I first bought it. Perfect, smooth shifts and Comfort mode is so powerful.
Wow, that’s great. I wish the OBD scanner was the solution for us as that was in the first thing we tried after we had the problem. We went through so much as you’ll see in later videos but eventually we did figure out what was causing it and It was completely unexpected.
Diane & Paul 😁😎
Code P0715 is triggered when the Engine Control Module (ECM) or Transmission Control Module (TCM) detects an irregular signal coming from the input/turbine speed sensor in the transmission. The input/turbine speed sensor is used to measure how many revolutions per minute (RPM) the input shaft of the transmission is turning. It is usually a three-wire sensor that reads a reluctor ring in the transmission. When this code is triggered, the vehicle will most likely go into “fail-safe” mode, which is a condition where the vehicle’s power and speed are limited to minimize damage to other components. The ECM/TCM does this because they don’t know how fast the transmission is spinning, and cannot safely select which gear to shift into.
Thanks Mike,
We can't wait to see what you think about our next video, out tomorrow, May 12th, which shows us trying to change the conductor plate. You must be a transmission guy so we will be interested if we made any wrong decisions with the many problems we had doing it.
Thanks,
Paul
@@carzombies Not a transmission guy. Just an amateur with a keen interest in car repair.. Looking forward to your future videos.
I was wondering if you disconnect the battery and leave it like that for 30 minutes to reset to factory... But then doing that it will reset the whole thing
Since this video we have resolved the problem (in a future video) and now we know that the "learn mode" steps really work, but they don't reset a x-mission in "limp mode," so it is too late to try your idea.
I wish we had tried it at the time...
Diane & Paul
@@carzombies You can reset the fault code with your scan tool. That should clear the fault. Then you can see if the same fault comes back and how quickly.
@@MikeM-cz5ln We tried that with the original diagnostic tool and it just didn't have the muscle for it. So we bought a better tool that should have worked and it didn't either (we'll discuss in the next video). We did eventually figure out how to reset the TCM, but it wasn't obvious.
It seems like I spend all my free time editing videos nowadays. Can't wait to show you the outcome.
Thanks for hanging on, Paul
P0715 Causes
There are many potential causes of code P0715.
Failed input/turbine speed sensor
Failed output speed sensor
Failed torque converter
Faulty wiring
Debris on input/turbine speed sensor
Debris on output speed sensor
Damaged reluctor ring for input/turbine speed sensor
Wow, you really know this stuff. Maybe we shouldn't have trusted the internet and went straight for the conductor plate.
Paul
@@carzombies Paul, I actually found this info on the Internet and it makes sense pertaining to the problems you are experiencing. It would be great if your scan tool can graph the data received from the turbine speed sensor. Anyways, I'll bet the sensor is easy to access. I would at least pull the connector off and visually inspect the terminals for corrosion. Maybe check the resistance of the sensor with an ohmmeter to see if it is in spec.
@@MikeM-cz5ln I think we found the problem. Please stay tune to see what it is, it may be a couple of weeks before I have the video edited and posted, but it wasn't the speed sensor, it was something else tangentially related.
Paul