Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer turned off the engine because there was a problem with the part that controls how much air goes into the engine.
The engine control module (ECM) has detected an issue with the throttle actuator control system and has shut down the engine to prevent damage.
The P2105 code is triggered when the ECM detects a malfunction in the throttle actuator control system, causing it to initiate a forced engine shutdown to prevent potential damage or unsafe driving conditions. The throttle actuator controls the opening and closing of the throttle plate, which regulates air flow into the engine.
• Engine stalls or shuts down unexpectedly
• Reduced engine power
• Check Engine Light illuminated
• Faulty throttle actuator
• Wiring issues in the throttle control circuit
• Faulty throttle position sensor
Throttle Actuator: A component that controls the opening and closing of the throttle plate.
ECM: Engine Control Module, the computer that controls engine functions.
• Check for other related codes and address them first.
• Inspect the throttle actuator and wiring for damage or disconnections.
• Test the throttle position sensor for proper operation.
• Replace the throttle actuator if faulty.
• Repair or replace damaged wiring or connectors in the throttle control circuit.
• Replace the throttle position sensor if it's malfunctioning.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks on throttle system components
• Ensure wiring and connectors are secure and undamaged
• Keep the throttle body clean
Engine Performance
• Do not drive the vehicle until the issue is resolved to prevent further damage.
• Consult with a professional mechanic for accurate diagnosis and repair.
Check with your vehicle manufacturer for specific warranty coverage related to engine control components.
The P2105 code has been commonly reported in vehicles with electronic throttle control systems, especially as these systems age.
High – This code indicates a forced engine shutdown, which can be dangerous if it occurs while driving.
Driving with a malfunctioning throttle control system can be unsafe. Address this issue promptly to ensure vehicle safety.
• Engine at operating temperature
• Vehicle in idle or low-speed conditions
The throttle actuator is located on the throttle body, which is typically found on the intake manifold of the engine.
Q: Can I drive with a P2105 code?
A: It's not recommended to drive with this code as it indicates a forced engine shutdown, which can be unsafe.
Q: What happens if I ignore a P2105 code?
A: Ignoring this code can lead to further engine damage and unsafe driving conditions due to unexpected engine shutdowns.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.