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Home >> Kia >> 2017 >> Soul Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 1.6L (1 Of 3) >> DTC P0121: Throttle Position Sensor 1 Signal Circuit Range/Performance >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
Case 1 DTC Strategy
  • Rationality check between TPS1 and TPS2.
  1. Poor connection
  2. TPS
  3. PCM
  4. Obstruction in the throttle plate movement
  5. Throttle body assembly
  6. APS
Enable Conditions
  • Engine speed greater than 320rpm.
Threshold Value
  • Difference between TPS1 and TPS2 position greater than 6.3% ~ 12.2%.
Diagnostic Time
  • 0.14 Seconds.
Case 2 DTC Strategy
  • If different, check between TPS1 and Model TPS data.
Enable Conditions
  • Engine speed greater than 320rpm.
Threshold Value
  • Difference between TPS1 position and Model TPS (if TPS2 error) greater than 9%.
Diagnostic Time
  • 0.2 Seconds
MIL ON Condition
  • 1 Driving cycle.
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