P0221 Code: Throttle Position Sensor B Range/Performance
🟠 Moderate severity · drivable
Yes, but acceleration may feel off and the car may enter limp mode — get it checked soon.
What P0221 means
The B circuit of the throttle position sensor is sending a signal, but the value doesn't match what the computer expects. This is usually a worn sensor, carbon buildup on the throttle, or wiring with too much resistance. The computer may limit power because it doesn't trust the throttle reading.
Symptoms
- Check engine light on
- Poor or uneven acceleration
- Reduced power or limp mode
- Hesitation
- Rough idle
Common causes
- most common: Worn throttle position sensor
- common: Carbon buildup on the throttle body
- common: High resistance in the sensor wiring
- rare: Engine computer (PCM) fault
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the throttle position sensor | Yes | $40–150 |
| Clean the throttle body | Yes | $10–40 |
| Inspect and repair the wiring or connector | Yes | $20–100 |
Frequently asked questions
Can I drive with a P0221 code?
Yes, but acceleration may feel uneven and the car may enter limp mode. Have it diagnosed soon.
What does range/performance mean in P0221?
It means the sensor is sending a signal, but the value doesn't line up with what the computer expects, often from a worn sensor or carbon buildup.
How much does it cost to fix a P0221?
A new throttle position sensor is usually $40–150, and cleaning the throttle body is only about $10–40.
Related codes
P0120
P0120 Code: Throttle Position Sensor Circuit
P0220P0220 Code: Throttle Position Sensor B Circuit Malfunction
P0122P0122 Code: Throttle Position Sensor/Switch Circuit Low Input
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.