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I had a question. On my 2006 mercedes s430 i have a P730 code and it’s stuck in fourth gear. When I attempt to read transmission codes using my Autel MaxiDAS it says failed to connect. Do yall think a new TCM is needed?
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Posted : 05/01/2025 2:08 pm
This code isn't one supported for repairs; however, P0730 points to an issue with the TCM detecting an incorrect gear ratio. Either the solenoid is faulty, bad transmission mount, or the filter and fluid need to be serviced. Some w220 S-Class owners have good results disconnecting the battery in the vehicle overnight to allow the TCM to go into a relearn mode.
Posted : 05/01/2025 2:09 pm