Throttle Actuator Control System -- Forced Engine Shutdown
What does P2105 mean?
The P2105 code means the vehicle's onboard diagnostic system has detected: Throttle Actuator Control System -- Forced Engine Shutdown. This is a critical severity code.
Common Symptoms
- Engine shuts off unexpectedly
- Engine will not restart
- Reduced power warning before shutdown
- Multiple throttle system warning lights
- Check engine light on
Probable Causes (Ranked by Likelihood)
- Critical electronic throttle system failure Very High
- Multiple throttle position sensor faults High
- Throttle plate stuck open -- safety shutdown Moderate
- Major wiring harness failure in throttle system Moderate
- PCM throttle control module failure Low
Step-by-Step Diagnostic Procedure
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Check for all stored and pending trouble codes -- multiple throttle codes are expected
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Inspect electronic throttle body for mechanical issues -- plate should move freely
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Test all accelerator pedal position sensor signals and throttle position sensor signals
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Inspect the entire throttle control wiring harness for damage, rodent chews, or connector issues
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If throttle body and wiring test good, PCM may need replacement and programming
Frequently Asked Questions
Can I drive with code P2105?
No. The PCM has shut down the engine because it detected a critical safety issue with the throttle control system. The vehicle should be towed to a repair facility. Do not attempt to bypass this safety system.
Why did my engine shut off on its own?
The PCM performs continuous monitoring of the electronic throttle system. If it detects a condition that could lead to unintended acceleration (such as a throttle stuck open or conflicting sensor signals), it shuts the engine down as a last-resort safety measure.
Is this a common problem?
Forced engine shutdown from throttle system faults is relatively rare and typically occurs only when multiple failures happen simultaneously. It is more common in vehicles with high mileage, rodent-damaged wiring, or after improper repairs to the throttle system.