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Home >> Kia >> 2019 >> Optima LX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 2.4L (2 Of 6) (Except HEV) >> DTC P0123-00: Throttle Position Sensor 1 Signal Circuit High Input >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Voltage monitoring
  1. Poor Connector Connection
  2. Short to Battery or Open in TPS1 Signal Circuit
  3. Open in TPS Supply Circuit
  4. Faulty TPS1
Enable Condition Case 1
  • Ignition "ON"
Case 2
  • Ignition "ON"
  • Engine operating state idle:
  • Pedal value lower than 0.01% (Pedal sensor 1 voltage 0.859V, not pushed at all)
  • TPS setpoint lower than 58%
  • TPS1 and TPS2 ratio failure detected or TPS2 failure detected
Threshold Value Case 1
  • TPS1 signal voltage higher than 4.9V
Case 2
  • TPS1 signal voltage at idle higher than 3.0V
Diagnostic Time
  • Continuous
MIL ON Condition
  • 1 driving cycle
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