P0221: Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance
3 vehicles · 3 makes · $50-$900 repair
Most Reported On
P0221 is an OBD-II diagnostic trouble code meaning “Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance.” This code means the second throttle or accelerator pedal position sensor (circuit B) is sending a signal that is out of the expected range or does not track properly with the other sensor. Modern drive-by-wire systems use redundant sensors, and the computer compares them for agreement. When sensor B's voltage is implausible or inconsistent, this code sets. It can cause hesitation, surging, reduced power, or a forced limp mode for safety. This code is most commonly reported on 2014-2021 Ford Transit Connect, 2007-2018 Jeep Wrangler (Sport, Sahara, Rubicon, X, Unlimited), and 2006-2016 Chevrolet Impala (LS, LT, LTZ, Premier), with repair costs ranging from $50 to $900.
Common Causes
Typical Repair Cost
Based on 3 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0221, 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
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Vehicles Affected (3)
FAQ
What does P0221 mean?
P0221 stands for "Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance." This code means the second throttle or accelerator pedal position sensor (circuit B) is sending a signal that is out of the expected range or does not track properly with the other sensor. Modern drive-by-wire systems use redundant sensors, and the computer compares them for agreement. When sensor B's voltage is implausible or inconsistent, this code sets. It can cause hesitation, surging, reduced power, or a forced limp mode for safety.
What are the most common causes of P0221?
The most common causes of P0221 are: Faulty throttle position sensor (sensor B), Faulty accelerator pedal position sensor, Dirty or worn throttle body, Wiring or connector problems (corrosion, chafing), Poor ground or reference voltage to the sensor, Intermittent open or short in the signal circuit, Faulty PCM/ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0221?
Repair costs for P0221 range from $50 to $900, depending on the vehicle and root cause.
Which vehicles are affected by P0221?
Au7o has documented P0221 across 3 vehicle models from 3 manufacturers: Chevrolet, Ford, Jeep.
Sources (4)
- ForumThrottle Body** Red Lightning Bolt** Limp Mode — JK-Forum.com
- ForumElectronic Throttle Control problem solved? — Jeep Wrangler Forum
- ForumReduced Engine Power and Service Stability Control / Throttle Body issue — Impala Forums
- Forum2011 Chevy Impala - Service Stabilitrak - Reduced Engine Power — Edmunds
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.