The P1120 code in your 2022 Ford Bronco indicates the throttle position sensor (TPS) is reading lower than the expected range. This Ford-specific code signals the sensor voltage is below minimum threshold for the current throttle plate position.
Understanding TPS Range
The Bronco's electronic throttle uses dual TPS sensors for redundancy. These sensors should provide voltage signals corresponding to throttle plate position. P1120 indicates the voltage is too low, suggesting a circuit problem or sensor failure.
Common Causes of P1120
- Faulty throttle position sensor
- Short to ground in TPS circuit
- Low reference voltage to sensor
- Connector corrosion or damage
- Throttle body failure
- PCM input circuit issues
Symptoms of Low TPS Reading
- Check engine light on
- Limp mode (reduced power)
- Poor throttle response
- Erratic idle
- Engine hesitation
- Possible stalling
Bronco Off-Road Considerations
The Bronco is designed for off-road use where throttle control is crucial for rock crawling and trail driving. TPS issues can affect precise throttle modulation needed for technical terrain.