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P2103 Throttle Actuator Control
Throttle Actuator Control Motor Circuit High
P2103 means the ECM detected excessive voltage in the throttle actuator control motor circuit, typically from a short to power or an open motor that cannot draw current.
🚗 Not recommended. High circuit voltage indicates a fault that can disable the throttle.
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🎯 Top Causes, Ranked by Likelihood
#1 Wiring shorted to voltage $50-$300
A short to power raises the control circuit voltage above the expected range.
#2 Open or failed throttle actuator motor $150-$600
An open motor winding stops current flow and reads high.
#3 Throttle body connector fault $0-$150
Corroded or open pins disrupt the motor circuit.
#4 ECM driver fault $200-$1200
A failed driver misreads the motor circuit voltage.
🩺 Common Symptoms Reduced power / limp mode Check engine light Unresponsive throttle Rough or high idle Possible stalling 💰 Repair Cost: DIY vs Shop
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🔧 How to Diagnose P2103 1 Inspect the throttle body connector and wiring for shorts to power
2 Test the motor winding for an open circuit
3 Check control circuit continuity to the ECM
4 Repair wiring or replace the throttle body, then relearn idle
❓ Frequently Asked Questions Can I drive with a P2103 code?
Avoid it. This fault usually forces limp mode with reduced power.
How much does it cost to fix P2103?
Wiring repairs are cheaper, but a throttle body replacement runs $150-$900 at a shop.
What causes P2103?
Usually a short to power in the motor wiring or an open throttle actuator motor winding.
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