P2101
Throttle Actuator Control Motor Circuit Range/Performance
The throttle motor responds, but its actual position does not track the commanded position within tolerance. Often a dirty throttle bore where the plate sticks, or a worn motor.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Common causes
Ordered by how often each turns out to be the cause.
- Throttle bore coked, plate sticksCommon
- Throttle motor wornPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Throttle Actuator Motor
- Throttle Body
P2101 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.