DTC P2109-00: Throttle/Pedal Position Sensor "A" Minimum Stop Performance [10/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of a throttle actuator, which operates the throttle valve, and a throttle position sensor, which detects the opening amount of the throttle valve. The ECM controls the throttle actuator to adjust the throttle valve opening amount so that the idle speed is maintained at the target idle speed.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| P2109-00 | Throttle/Pedal Position Sensor "A" Minimum Stop Performance | The Throttle Air Flow F/B Value* approaches its limit even though the actual intake air amount during idling is within the normal range (up to 1.5 times the normal amount) (1 trip detection logic). *: Data List item |
Throttle body with motor assembly | Does not come on | Engine | B |
|
HINT:
- This malfunction is only detected once per trip. After it has been detected once, the system will not monitor for the malfunction for the rest of the trip.
- The system uses the throttle body with motor assembly and mass air flow meter sub-assembly to detect this malfunction.