Code Definition

P2112 — Throttle Actuator Control System - Stuck Closed

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Toyota

About P2112

P2112 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Toyota vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2112 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The electronic throttle body positions the throttle plate with a direct current motor under engine control module command, while two throttle position sensors report the actual plate angle back to the module. A return spring holds the plate at a small default opening when the motor is unpowered, which is what allows the engine to run in a limited fashion if the system fails. DTC P2112 sets when the module commands the throttle to open but the position sensors show the plate staying closed or barely moving, indicating a mechanical restriction rather than a purely electrical fault. Unable to con...

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