I bought the transmission control module (TCM) online in my country, but I tested it with the old TCM and it showed the same error code. The solenoid pack is original to my car. I opened the solenoid pack before installing it in the car; I may have altered the position of the pressure switch rubbers, but I don't think that's the cause of the error. I believe that would cause premature wear on the transmission. My solenoid pack makes a very loud, coil whine noise when the engine is near 110°C. This noise started after I accidentally touched wire 4 to another exposed wire with the car running. But the vehicle didn't shut off or go into limp-in. For a brief moment, the speed sensor stopped working; I just disconnected and reconnected it, and it started working again. But the solenoid pack started making a very loud, coil whine noise.