DTC P2109: Throttle / Pedal Position Sensor "A" Minimum Stop Performance [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. 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. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P2109 | The ISC learned value is approximately 3 times larger than normal even though the actual intake air amount during idling is within the normal range (up to 1.5 times the normal amount) (5 trip detection logic). | Throttle with motor body assembly |
HINT:
- The ISC learned value is the calculated intake air amount corresponding to the throttle opening amount necessary to maintain the idle speed.
- 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 with motor body assembly and mass air flow meter sub-assembly to detect this malfunction.