P2106: How to Diagnose & Fix — Throttle Actuator Control System - Forced Limited Power
2 vehicles · 1 makes · $350-$900 repair
How to diagnose and fix P2106: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Ford Freestyle · 2005–2007
The Ford Freestyle is subject to a significant safety issue where the vehicle surges or lunges forward unexpectedly at low speeds when in gear, even without the accelerator pedal being applied. The NHTSA investigated 238 complaints about this behavior, finding that a programming error in the engine computer causes the electronic throttle body to malfunction, particularly when the engine is under load from A/C operation, steering at full lock, or carrying heavy loads. In 18 reported cases, the surge caused accidents. Ford eventually issued a recall in December 2012 to reprogram the throttle body or replace it and reimburse owners who had already paid for the repair.
Common Symptoms
- Vehicle lurches or surges forward at low speed without pressing the gas
- Sudden unexpected acceleration while in a parking lot or at a stop
- Surging is worse when the A/C is running
- Surging occurs when the steering wheel is turned to full lock
- Engine idles erratically or races when in gear
- Check engine light with throttle position sensor codes
How to Fix
Contact your Ford dealer to verify the throttle body recall has been completed on your vehicle. If not, Ford will reprogram the throttle body control module or replace the throttle body assembly free of charge. If you already paid for a throttle body repair before the recall, contact Ford for reimbursement. Until the recall is completed, be especially cautious when the A/C is running and the steering wheel is turned sharply — these are the most common conditions that trigger the surge.
Sources for this issue (2)
Ford Explorer · 2006–2010
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.
Common Symptoms
- wrench light on
- sudden loss of throttle response
- limp mode
- reduced engine power
- rough idle
- stalling or near-stalling
How to Fix
Diagnosis includes scanning for throttle actuator and correlation codes, checking connector condition, and confirming commanded versus actual throttle angle. The usual fix is replacement of the throttle body assembly, followed by idle relearn and clearing codes. Cleaning may help if carbon buildup is minor, but many failed units require complete replacement.
Sources for this issue (1)
Find P2106 by make
Browse every documented model and issue for your make.
P2106 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2106 mean?
P2106 stands for "Throttle Actuator Control System - Forced Limited Power." P2106 means the engine computer has put the electronic throttle control (drive-by-wire) system into a 'forced limited power' or reduced-power mode. This code doesn't point to a failed part itself — it's a protective response, set because the computer detected another throttle-related fault (a bad throttle position sensor, accelerator pedal sensor, or throttle body) and limited engine power to keep you safe. You'll usually notice sluggish acceleration, a 'reduced power' warning, or the car feeling like it won't rev past a certain point. The underlying throttle fault, almost always stored as a companion code, must be found and fixed.
What are the most common causes of P2106?
The most common causes of P2106 are: Faulty throttle position sensor (TPS) or throttle body, Failed or dirty electronic throttle body / actuator motor, Accelerator pedal position sensor fault, Wiring, connector, or ground problems in the throttle/pedal circuit, Companion throttle codes (P2101-P2135) triggering limp mode, Low system voltage or charging issue affecting the throttle module, PCM/ECM software or internal fault. The specific cause varies by vehicle.
How much does it cost to fix P2106?
Repair costs for P2106 range from $350 to $900, depending on the vehicle and root cause.
Which vehicles are affected by P2106?
Au7o has documented P2106 across 2 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.