That code relates to an electrical problem with the turbo vacuum control solenoid. If you have already changed the solenoid and the ECU, the only thing left is the wires from the ECU to the solenoid. Suggest you grab an ohmmeter and check them out.
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Fuse 16 in the power distribution centre is not blown. It provides power for the Auto Shut Down Relay (ASD Relay) which in turn provides power to the turbo solenoid.
Check there is 12V on pin 1 of the solenoid plug when the ignition is on. Pin 1 is on the right when looking at the plug with the connection tab at the top.
With the power off, unplug both the solenoid and the ECU. Then measure between pin 2 of the solenoid plug and pin 76 on the ECU C1 connector. The resistance should be below 10 ohms. C1 connector is the bigger one. Looking at the plug with the five big pins at the top, the right row is numbered from 63 at the bottom to 81 at the top. Count up from 63 to find pin 76.
With the power off, unplug both the solenoid and the ECU. Then measure the resistance from solenoid pin 2 to ground. It should be higher than 1000 ohms.
I suspect the car would not start and there would be several other things not working and error codes galore. i doubt the fuse is the problem, but it is a 30-second check and it does power the solenoid, so I included it.
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P0243 help help 2.7 crd
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