DTC P2100-18: Throttle Actuator "A" Control Motor Circuit Current Below Threshold; DTC P2100-19: Throttle Actuator "A" Control Motor Circuit Current Above Threshold [11/2021 - 03/2022]: Description

WARNING: This page is about a different car, the 2025 Lexus NX 250, 2024 Lexus NX 250, 2023 Lexus NX 250, and 2022 Lexus NX 250. However, it is still accessible from the selected car via links, so may be relevant.

The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears.

The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body with motor assembly. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
P2100-18	Throttle Actuator "A" Control Motor Circuit Current Below Threshold	Both of the following conditions are met for 2 seconds or more (1 trip detection logic): The throttle actuator drive duty cycle is 80% or higher. The throttle actuator current is less than 0.5 A.	Open or short in throttle actuator circuit Throttle actuator ECM	Comes on	SAE Code: P2102
P2100-19	Throttle Actuator "A" Control Motor Circuit Current Above Threshold	Either of the following conditions is met (1 trip detection logic): A motor driver IC high current limiter monitor input malfunction is detected. A motor driver IC high current inhibit signal is received.	Open or short in throttle actuator circuit Throttle actuator Throttle valve Throttle body with motor assembly ECM	Comes on	SAE Code: P2103