Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance

Where it lives

For P0221, the description names the sensor as the part involved.

Check these first

• A faulty throttle or pedal position sensor B
• Wiring or connector issues between sensor B and the ECM
• Corrosion on the sensor B connector
• A sticky throttle body or pedal assembly
• An ECM calibration issue

What to do next

1. Read throttle or pedal position sensor B on a scan tool
2. Compare sensor B to sensor A through the pedal sweep
3. Inspect the sensor B connector and wiring
4. Clean the throttle body and pedal assembly
5. Replace throttle or pedal position sensor B if it reads off
6. Clear the code and retest

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