P2101: Throttle Actuator "A" Control Motor Circuit Range/Performance
6 vehicles · 4 makes · $140-$900 repair
Most Reported On
P2101 is an OBD-II diagnostic trouble code meaning “Throttle Actuator "A" Control Motor Circuit Range/Performance.” This powertrain code means the engine computer commanded the electronic throttle actuator motor to a certain position but the motor did not respond within the expected range. Modern engines use a drive-by-wire throttle, where a motor opens and closes the throttle plate based on signals from the computer rather than a cable. When the actual throttle position disagrees with the commanded position, the computer sets this code, often forcing the vehicle into a reduced-power 'limp' mode to protect the engine. This can cause poor acceleration or stalling and should be addressed promptly. This code is most commonly reported on 2004-2009 Jaguar XJ, 2007-2015 Jaguar XK, and 2014-2021 Ford Transit Connect, plus 3 other vehicles, with repair costs ranging from $140 to $900.
Common Causes
Typical Repair Cost
Based on 6 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P2101, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (6)
FAQ
What does P2101 mean?
P2101 stands for "Throttle Actuator "A" Control Motor Circuit Range/Performance." This powertrain code means the engine computer commanded the electronic throttle actuator motor to a certain position but the motor did not respond within the expected range. Modern engines use a drive-by-wire throttle, where a motor opens and closes the throttle plate based on signals from the computer rather than a cable. When the actual throttle position disagrees with the commanded position, the computer sets this code, often forcing the vehicle into a reduced-power 'limp' mode to protect the engine. This can cause poor acceleration or stalling and should be addressed promptly.
What are the most common causes of P2101?
The most common causes of P2101 are: Faulty throttle actuator control motor (throttle body), Dirty or carbon-fouled throttle plate causing binding, Wiring or connector problems in the throttle actuator circuit, Failed throttle position sensor inside the throttle body, Poor electrical connection or corroded terminals, Faulty engine control module (less common). The specific cause varies by vehicle.
How much does it cost to fix P2101?
Repair costs for P2101 range from $140 to $900, depending on the vehicle and root cause.
Which vehicles are affected by P2101?
Au7o has documented P2101 across 6 vehicle models from 4 manufacturers: Buick, Ford, Jaguar, Pontiac.
Sources (5)
- ForumG6 'Engine Power Reduced' Message - Pontiac G6 Forum
- Forumfixed at last! P0121, P2135, reduced engine power - Pontiac Owners Group
- articleP2135 Pontiac: Meaning, Causes, Symptoms (engine-codes.com)
- articleA Guide to the Fuel Injection Throttle Body for the 2006-2011 Buick Lucerne - Go-Parts
- Forum2006 Buick Lucerne 3.8 reduced power codes P1516 U0107 - JustAnswer
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.