P1120 Throttle Position Sensor Out of Range
What does P1120 mean on a Ford?
P1120 — Throttle Position Sensor Out of Range. This Ford-enhanced code applies to F-150, Mustang, Ranger, Explorer, Taurus.
Common causes of P1120
- Worn throttle position sensor with dead spots
- Misadjusted throttle stop holding the blade off its rest
- Carbon buildup preventing full throttle closure
- Damaged TPS wiring or connector
- Incorrect aftermarket throttle body
How to fix P1120
- Sweep the throttle slowly and watch TPS voltage for jumps or gaps
- Clean carbon from the throttle bore and plate
- Verify closed-throttle and wide-open voltages against spec
- Inspect the TPS connector and wiring
- Replace the sensor if the sweep is not smooth and in range