Error code

OBD2 P2105

OBD2P2105
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Throttle Actuator Control System - Forced Engine Shutdown.

Severity

severeThe vehicle will likely be in a fail-safe mode with limited power, making it difficult to drive safely.

Summary

P2105 indicates that the throttle actuator control system has forced an engine shutdown due to a detected fault or failure in the electronic throttle control system.

Symptoms

  • Stored trouble code and illuminated CHECK ENGINE light
  • Vehicle will be in fail-safe or limp mode until the issue is resolved, potentially preventing the engine from restarting

Common Causes

  • Damaged wiring or connectors in the throttle control system
  • Faulty stepper motor or excessive wear of drive gears
  • Defective pedal position sensor
  • Defective throttle plate position sensor
  • Corrupted PCM software
  • * Engine overheating
  • * EGR valve failure
  • * Faulty Mass Airflow Sensor
  • * ABS brake system defects
  • * Defects in cruise control and stability control systems

Diagnosis

  1. Check for additional trouble codes that may provide more context.
  2. Inspect wiring and connectors for damage or corrosion.
  3. Test the throttle position sensors and stepper motor for proper operation.
  4. Verify PCM software integrity.

Fixes

  • Replace faulty components such as the throttle actuator control motor, pedal position sensor, or throttle plate position sensor

FAQ

Can I drive with P2105?

No, driving is not recommended due to safety concerns and the vehicle being in a fail-safe mode.

What causes P2105?

Common causes include wiring issues, faulty sensors or motors, and software corruption.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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