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P2105 Throttle Actuator Control
Throttle Actuator Control System - Forced Engine Shutdown
P2105 means the throttle actuator control system detected a fault severe enough that the ECM commands a forced engine shutdown to protect the vehicle from uncontrolled throttle.
🚗 No. The ECM may shut the engine down as a failsafe.
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🎯 Top Causes, Ranked by Likelihood
#1 Throttle body or actuator motor failure $150-$600
A failed throttle body triggers the shutdown failsafe.
#2 Throttle or pedal position sensor fault $100-$400
Conflicting sensor signals force the shutdown response.
#3 Wiring or connector fault $50-$300
Open or shorted circuits trip the safety shutdown.
#4 ECM fault $200-$1200
An internal ECM problem commands the shutdown.
🩺 Common Symptoms Engine shutdown or stalling Reduced power / limp mode Check engine light No throttle response Hard or no restart 💰 Repair Cost: DIY vs Shop
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🔧 How to Diagnose P2105 1 Scan for related throttle actuator codes
2 Inspect throttle body wiring and connectors for faults
3 Read live data for throttle and pedal sensors
4 Repair the root cause and clear codes, then relearn idle
❓ Frequently Asked Questions Can I drive with a P2105 code?
No. This code can shut the engine down, which is dangerous. Have it diagnosed before driving.
How much does it cost to fix P2105?
Repairs depend on the cause but commonly run $200-$1000 at a shop.
Why does P2105 shut off my engine?
It is a safety failsafe triggered when the ECM cannot trust the throttle system.
🔗 Related Codes
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