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P0122: Throttle Position (TP) Sensor Circuit Low Input (All Others)

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P0122 - THROTTLE POSITION (TP) SENSOR CIRCUIT LOW INPUT (ALL OTHERS)

Description:  The TP sensor circuit is monitored by the PCM for a low TP rotation angle (or voltage) input through the comprehensive component monitor (CCM). If during key ON, engine OFF or key ON, engine running the TP rotation angle (or voltage) changes below a minimum calibrated limit, the test fails.
Possible Causes: 
  • TP sensor not seated properly.
  • TP circuit open to PCM.
  • VREF open to TP sensor.
  • TP circuit short to GND.
  • Damaged TP sensor.
  • Damaged PCM.
Diagnostic Aids:  The fault exhibits a symptom of limited power. A TP PID (TP V PID) reading less than 3.42% (0.17 volt) in key ON engine OFF, continuous memory or key ON engine running indicates a hard fault.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Others GO to PINPOINT TEST DH: THROTTLE POSITION (TP) SENSOR Step 12. GO to PINPOINT TEST DH: THROTTLE POSITION (TP) SENSOR Step 12. GO to PINPOINT TEST DH: THROTTLE POSITION (TP) SENSOR Step 12.
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