How much does it cost to fix P2105?

DIY repair typically costs $100–$500 for parts. Professional repair runs $300–$1500 including parts and labor.

P2105

Powertrain

Critical

Throttle Actuator Control System — Forced Engine Shutdown

Get Your FREE AI Diagnostic Report

Enter your vehicle for a personalized diagnosis for code P2105

The P2105 code represents the most severe throttle actuator control system safety response — forced engine shutdown. This code means the PCM detected a critical, unrecoverable failure in the electronic throttle control system and determined that the only safe action was to shut the engine off completely. This is an emergency safety feature designed to prevent runaway engine conditions.

This is an extremely serious code. If your engine shut off while driving, safely coast to the shoulder and turn on your hazard lights. Do not attempt to restart and drive the vehicle — even if the engine restarts, the underlying fault that caused the emergency shutdown is still present and could recur at any time, potentially in a more dangerous situation.

Have the vehicle towed to a qualified repair facility. The technician will need to scan for all stored codes, as P2105 is always accompanied by other throttle system fault codes that identify the root cause. This is not a DIY repair — the electronic throttle control system is safety-critical, and improper diagnosis or repair could result in dangerous driving conditions. Professional diagnosis with factory-level scan tools is essential.

Severity

Critical — Do Not DriveImmediately

Symptoms

•Engine shuts off and will not restart
•Check engine light on (visible when ignition is on)
•Complete loss of power while driving
•Multiple warning lights illuminated on dashboard
•Vehicle must be towed — cannot be driven

Likely Causes

Severe throttle control system malfunction triggering safety shutdown40%

P2105 is the most severe throttle safety code. The PCM has detected a critical failure in the electronic throttle control system that it cannot safely manage, forcing a complete engine shutdown to prevent runaway acceleration or other dangerous conditions.

Multiple simultaneous throttle sensor failures25%

When both throttle position sensors or both accelerator pedal position sensors provide conflicting or invalid data simultaneously, the PCM has no reliable way to determine throttle intent and shuts the engine down as an emergency measure.

Critical electronic throttle body failure20%

A throttle body that is mechanically stuck or has a complete electrical failure may cause the PCM to determine that the engine cannot be safely controlled and must be shut down immediately.

PCM internal fault or power supply issue15%

A failing PCM or unstable power supply to the throttle control module can cause erratic throttle commands that the safety monitoring system detects as dangerous, triggering an immediate shutdown.