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There are several threads on this. It's caused by the Torque app. If Torque is running when you start the car, the ECU gets confused, throws the U0073 code and puts the car into limp mode. You'll get the engine and traction lights and your air conditioner and cruise control will stop working.
The fix is easy. Just make sure that Torque is NOT RUNNING when you start the car. Even if you just stop for gas, exit Torque before starting the car again. You can exit Torque easily without turning off your phone by hitting the Android "back" button twice and selecting "OK" when asked if you really want to exit Torque.
If you drive with the car in limp mode (drive it without clearing the code first), the car will still be sluggish after you reset the code. That will clear up after a couple of restarts. The computer has to relearn. If you happen to notice that the check engine light has come on and reset the code before you take off in it, it will not be sluggish after you clear the code.
Also, it has been suggested that your OBDII connector plays a part. It doesn't. You can use the most expensive adapter or the cheapest piece of crap and still get the code if Torque is running when you start the car. It's the app, not the adapter.
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