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Join Date: Jul 2019
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SMG Pump and No Shifting Issues
Have a 05/07 (build date) M5 with 95k miles. Recently got in it and got the red gear icon and the car wont start. Scanned the car, cleared the codes and the car will start and shift into gear once or twice before it sounds like a can full of marbles and goes into limp again.
Got the following codes from the SMG system:
CF12, this is a hard code and will not clear
4FA0, code appears after marble in can sound
5103, same as above, will clear but comes back after marble sound
I replaced the electric SMG motor thinking I have a low pressure issue and while the pump sounds quieter it hasn't fixed anything. I can run the pump and build up pressure with my scan tool just fine. As long as I have enough pressure the transmission shifts into 1st and reverse just fine.
The issue is that once the pressure drops the pump stops running and you have to start the process of clearing codes and running the pump manually all over just to move the car.
Any ideas? Thinking it might be the accumulator and or the PLCD sensor or some sort of pressure sensor?
My current scan tool can not do SMG adaptation what scan tool should I get?