I do not recall a dealer cleaning the throttle body as part of the 60k service. I will tell you that I once took my throttle body off to clean it and when I replaced it, it gave off a code that indicated the sensor had to be replaced. Seems to me that if they cleaned your throttle body (and I don't know if they took it out or merely sprayed it with throttle body/carb cleaner), that the material could have fouled up your sensor. I do not know why software would need to be reinstalled since there is nothing but a sensor at the throttle body. The software is in the ECU unit.
Delgado
San Diego
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