P2104 on Ford
Throttle Actuator Control System - Forced Idle
P2104 on Ford vehicles indicates throttle actuator control system - forced idle. Au7o has documented this code across 1 Ford model — most commonly on Explorer. This code means the engine computer detected a serious fault in the electronic throttle actuator control (TAC) system and has put the engine into a protective forced-idle (limp) mode. In this mode the throttle plate is held near the idle position regardless of how far you press the accelerator, so the vehicle has little to no acceleration. This is a fail-safe to prevent unintended throttle behavior. Because it severely limits power and can leave the vehicle unable to keep up with traffic, it should be diagnosed and repaired quickly. Typical repair costs on Ford range from $350 to $900, depending on the specific model and root cause.
Common Causes of P2104
- •Faulty throttle body / throttle actuator motor
- •Faulty accelerator pedal position sensor
- •Wiring or connector faults in the throttle or pedal circuits
- •Throttle position sensor disagreement / range fault
- •Carbon buildup binding the throttle plate
- •PCM/ECM internal fault
- •Low system voltage or poor grounds
P2104 on Ford by Model
Ford Explorer(1 issue)
- Throttle Body Failure on 4.6L V8 Causing Wrench Light, Limp Mode, and Sudden Loss of Power2006-2010
Later 4th-generation Explorers with the 4.6L 3-valve V8 commonly suffer electronic throttle body problems. Owners report the wrench light illuminating, the vehicle abruptly entering fail-safe mode, and the engine losing throttle response or dropping to idle while driving. This issue is well documented across Ford products using similar electronic throttle bodies and is frequently associated with internal motor or throttle position sensor faults.
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View P2104 across all makes →Frequently Asked Questions
What does P2104 mean on Ford?▼
P2104 stands for "Throttle Actuator Control System - Forced Idle." This code means the engine computer detected a serious fault in the electronic throttle actuator control (TAC) system and has put the engine into a protective forced-idle (limp) mode. In this mode the throttle plate is held near the idle position regardless of how far you press the accelerator, so the vehicle has little to no acceleration. This is a fail-safe to prevent unintended throttle behavior. Because it severely limits power and can leave the vehicle unable to keep up with traffic, it should be diagnosed and repaired quickly. On Ford specifically, this code is documented across 1 model.
What causes P2104 on Ford vehicles?▼
Common causes on Ford: Faulty throttle body / throttle actuator motor, Faulty accelerator pedal position sensor, Wiring or connector faults in the throttle or pedal circuits, Throttle position sensor disagreement / range fault, Carbon buildup binding the throttle plate. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2104 on a Ford?▼
Repair costs on Ford range from $350 to $900, depending on the specific model and root cause.
Which Ford models have P2104 documented?▼
Au7o has documented P2104 on 1 Ford model: Explorer.