P2111 on Toyota: How to Diagnose & Fix
Throttle Actuator Control System - Stuck Open
1 Toyota model · 1 documented issue · 1 critical
P2111 on Toyota by model: symptoms, diagnosis and fix
Owners of 2006-2010 Corollas equipped with the electronic throttle control system (ETCS-i) reported episodes of low-speed surging — the car lunging or accelerating slightly on its own at low speed (e.g., in parking lots or creeping traffic) such that braking sometimes felt insufficient to stop in time. NHTSA received a petition and opened scrutiny covering roughly 1.69 million 2006-2010 Corollas with electronic throttle control, separate from (and in addition to) the well-known floor-mat-entrapment and sticky-accelerator-pedal recalls of the same era. While Toyota and NHTSA's technical reviews did not confirm an electronic root cause, the surging complaints are numerous, well-documented, and a frequent owner search.
Common Symptoms
- Vehicle lunges or surges forward at low speed
- Brief unexpected acceleration in parking lots / stop-and-go traffic
- Higher-than-expected idle or RPM creep
- Brake pedal feels like it must be pressed harder to stop
- Hesitation followed by surge on tip-in
How to Fix
First rule out the known mechanical recall causes: verify the floor-mat-entrapment and accelerator-pedal recalls are completed for your VIN at toyota.com/recall (floor-mat shimming/pedal replacement). Ensure only correct, properly secured Toyota all-weather mats are used. Have the throttle body cleaned and the accelerator pedal position sensor and ETCS checked; clear any stored throttle/idle codes. If surging persists, document it (dashcam/video), report it to NHTSA, and have a dealer inspect for throttle/idle-control faults.
Sources for this issue (3)
P2111 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2111 mean on a Toyota?
P2111 stands for "Throttle Actuator Control System - Stuck Open." This code sets when the throttle actuator control (electronic throttle) system detects that the throttle plate is stuck in an open position and is not closing as commanded. Modern engines use a 'drive-by-wire' throttle where a motor moves the throttle plate based on accelerator pedal input, and dual position sensors confirm its actual angle. When the computer commands the throttle to close but the sensors show it remaining open, it sets this code and typically forces the engine into a reduced-power 'limp' mode for safety. It generally points to a mechanical bind, a failing throttle motor, or sensor issues inside the throttle body. On Toyota it is documented across 1 model: Corolla.
What are the most common causes of P2111?
The most common causes of P2111 are: Carbon buildup binding the throttle plate, Faulty throttle body motor or actuator, Failed throttle position sensor inside the throttle body, Stuck or damaged throttle plate return mechanism, Wiring or connector fault at the throttle body, Debris or foreign object obstructing the throttle plate, Faulty engine control module driver circuit. The specific cause varies by vehicle.
How much does it cost to fix P2111 on a Toyota?
Repair costs vary widely with the root cause and Toyota model; each issue on this page carries its own estimate where one is published.
Looking for P2111 on a different make?
View P2111 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.