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

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
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 or loose connection on the TP circuit connectors and pins
  • VREF open to TP sensor
  • VREF short to SIG RTN
Diagnostic Aids:  A TP PID between 3.42-9.85% (0.17-0.49 volt) in key ON, engine OFF or key ON, engine running indicates a concern is present.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST DH .
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