I’m having the same code U0073 after changing a 3.2 auto to a 3.5 auto I replaced the subframe, engine, engine wire harness, transmission, ECU , fuse box wiring,
full chassis harness
radiator

abs module

re pinned ac condensor plug

The car runs and drives smoothly but sometimes the battery dies parasitic drain the Bluetooth has been removed long time ago

 

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Maybe start with the ECM as pointed to below.

 

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THANK YOU SO MUCH, so I guess I have to take it to a Acura dealer to update the ECU,

is that the only way to update the ECU ..?

 

Hello I’m looking for diagram for all modules use for communication

also is there a way to test all modules

I getting and U0073 code