P0221 on Ford: How to Diagnose & Fix
Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance
1 Ford model · 1 documented issue · 1 critical · $140-$900 repair
P0221 on Ford by model: symptoms, diagnosis and fix
Owners report sudden reduced power, poor throttle response, and limp-home behavior due to electronic throttle body contamination/wear or throttle actuator control faults. The issue can be intermittent and may clear after a key cycle, then recur, which is a common pattern in NHTSA complaints and owner reports. It often sets throttle/ETC-related DTCs and can be triggered by carbon buildup or failing throttle position sensing.
Common Symptoms
- Reduced engine power message/limp mode
- Poor throttle response or no acceleration
- Stalling or near-stalling at idle
- Intermittent issue resolved by key cycle
- Check engine light on
How to Fix
Confirm DTCs and perform throttle body inspection/cleaning if contamination is present; if faults persist, replace the throttle body assembly and perform the required idle/throttle relearn procedure. Inspect related wiring/connectors and verify PCM updates if applicable.
Sources for this issue (1)
P0221 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 P0221 mean on a Ford?
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. On Ford it is documented across 1 model: Transit Connect.
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 on a Ford?
Published repair estimates on Ford range from $140 to $900 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0221 on a different make?
View P0221 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.