P2105 — Throttle-actuator control system — forced engine shutdown

P2105 concerns throttle-actuator control system. The control system reports that an engine-shutdown response has been invoked. This label describes a commanded engine-shutdown state. It does not identify the initiating fault or confirm that the throttle body requires replacement.

Affected system: Electronic throttle and pedal control

Symptoms

• The engine may shut down unexpectedly or refuse to start.
• Engine warnings and severely reduced accelerator response may be present.

Possible causes

• Forced shutdown may be triggered by faults affecting electronic throttle control or relevant sensors.
• Poor wiring connections, pedal or throttle-position sensors, or the actuator may be involved.

What to check

• Scan all companion codes before replacing throttle components.
• Inspect the throttle body, accelerator pedal and nearby wiring connectors.
• Check sensor readings and electrical supply against the vehicle procedure; do not drive if the engine may shut down.

Also written as: P2105-00, P210500 (some scan tools add the fault-type byte, e.g. -00).