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Hi my name is john.
You will need a scan tool to clear the code to reset,but if there is a problem it will come right back on.
Here how to test for that code
They closed your other question
Let me know what else you need.
I check the fluid level first.
Smell the fluid it should be sweet.
Than pull the tran pan and check the filter is not pluged.
There say you might need a new solnoid
Check the wiring.
Let me know if you need to replace the solnoid pack
Here a cpoy of a TSB for your p0730 and 55 are the same code.