P0221
PowertrainThrottle Pedalhigh severityThrottle/Pedal Position Sensor/Switch B Range/Performance
What P0221 Means
The secondary TPS signal is out of expected range.
Symptoms
- Check Engine Light
- Limp mode
- Erratic throttle
Common Causes
- Worn TPS B
- Carbon on throttle plate
- Throttle body issue
Diagnostic Steps
- Compare TPS A and B readings
- Clean throttle body
- Test TPS sweep
Where to start: Clean throttle body or replace TPS.
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