DTC P1120: Throttle Position (TP) Sensor Out of Range Low (RATCH Too Low)

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

Description:	The 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). If during key on, engine off (KOEO) or key on, engine running (KOER), the TP rotation angle (or voltage) remains within the calibrated self-test range but falls between 3.42 and 9.85% (0.17 and 0.49 volt), the test fails.
Possible Causes:	TP circuit with frayed wires Corrosion on the TP circuit connectors VREF open to TP sensor VREF short to SIG RTN TP sensor loose pins
Diagnostic Aids:	A TP PID (TP V PID) between 3.42 and 9.85% (0.17 and 0.49 volt) in KOEO, continuous memory, or KOER indicates a concern is present.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to DH: Throttle Position (TP) Sensor STEP DH3.