P2101 Throttle Actuator Control Motor Circuit Range/Performance

P2101 means the electronic throttle actuator motor is not moving the throttle plate to the commanded position within range — the drive-by-wire feedback does not match what the module commanded.

Code details

Generic OBD-II · P2

System: Speed / Idle
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not clear the code and drive without addressing it; a throttle that will not track command can force a reduced-power mode.

Symptoms of P2101

Reduced-power / limp mode, sometimes with a warning light.
Poor or erratic throttle response.
A rough or hunting idle.

Common causes of P2101

A dirty throttle body binding the plate.
A failed throttle-actuator motor.
Throttle-body wiring or connector faults.
A throttle-position-sensor problem inside the unit.

Useful checks before replacing parts

Compare commanded throttle position with the actual position feedback.
Inspect the throttle body for carbon binding the plate.
Check throttle-body power, ground, and connector integrity.

Related OBD-II codes

These nearby speed / idle entries can help compare wording and pin down the fault area.