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DTC P1120: Throttle Position Sensor A Out Of Range Low (RATCH Too Low)

P1120 - THROTTLE POSITION SENSOR A OUT OF RANGE LOW (RATCH TOO LOW)

Description:  The throttle position (TP) sensor circuit is monitored by the powertrain control module (PCM) for a low TP rotation angle or voltage input below the closed throttle position through the comprehensive component monitor (CCM). The test fails if the TP rotation angle or voltage remains within the calibrated self-test range, but falls between 3.42-9.85% (0.17-0.49 volt).
Possible Causes: 
  • TP circuit with frayed wires
  • Corrosion
  • Incorrect connections
  • VREF open to TP sensor
  • VREF short to SIGRTN
Diagnostic Aids:  A TP PID between 3.42-9.85% (0.17-0.49 volt) in ignition ON, engine OFF or ignition ON, engine running indicates a concern is present.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST DH .
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