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2018 FORD F-150
5.0L V8 Coyote•RWD•AUTOMATIC•gas
19 active safety recalls on this vehicle — view recalls
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Repairs420Labor1001Torque8720Fluid18DTC2308Battery2Maintenance0Recalls19
P1120moderate severityPowertrain

Throttle Position Sensor Out of Range Low

on 2018 Ford F-150 5.0L V8 Coyote · RWD

What this code means

The Throttle Position sensor signal is below the minimum expected voltage. The PCM sees a voltage lower than the normal idle-position signal from the TP sensor.

Symptoms

  • Check Engine Light
  • Poor acceleration
  • Idle surge
  • Engine stalling
  • Limp mode

Common causes

  • Faulty TP sensor
  • Wiring short to ground
  • Loose connector
  • TP sensor misadjusted
  • Corroded connector

Diagnostic steps

  1. Check TP sensor voltage at idle (should be ~0.5-1.0V)
  2. Inspect wiring for shorts to ground
  3. Check connector for corrosion or looseness
  4. Test TP sensor through full range with multimeter
  5. Check 5V reference voltage

Repair notes

Replace TP sensor if faulty. Repair wiring if shorted.

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