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Had my 2016 3.5L go into limp mode, say downhill asst not working. Pulled over, sat a few minutes started right up but check engine light. Went to parts store their code reader said it was throttle actuator.
Not yet, but you need to pay attention to the whole code description.
2112 = stuck closed to save your behind instead of the motor running out of control from an open throttle.
They are safety codes and actions separate from the computer.
Get service from a shop that knows how to service this area.
Good luck.