What P0122 Means
The throttle position sensor is sending a signal lower than the engine control module expects at any point in its range of motion.
Common Causes
- Faulty throttle position sensor
- Damaged or corroded wiring/connector
- Dirty or worn throttle body affecting sensor contact
Symptoms You Might Notice
- Hesitation or jerky acceleration
- Idle may be unstable
- Check engine light on
- Possible reduced-power mode in severe cases
What to Check First
- 1
Inspect the sensor's wiring and connector for damage
- 2
Clean the throttle body, since carbon buildup can affect sensor contact on some designs
- 3
Test the sensor's voltage output through its full range and replace if it drops out or reads incorrectly