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Home >> Kia >> 2016 >> Sedona LX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (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
  6. APS
Enable Conditions
  • Engine "ON"
Threshold Value
  • Throttle opening is less than 40%
  • MAP/BARO is less than 0.89
  • Difference of TPS1 flow and real flow is less than -0.4 or greater than 0.4
  • Difference of TPS2 flow and real flow is greater than -0.4 or less than 0.4
Diagnostic Time
  • 15.6 msec.
Case 2 DTC Strategy
  • If different, check between TPS1 and Model TPS
Enable Conditions
  • IG "ON"
    • TPS1 Out of Range High Test is Not Failed
    • TPS1 Out of Range Low Test is Not Failed
    • TPS1 Out of Range High Fail Count = 0
    • TPS1 Out of Range Low Fail Count = 0
  • Engine "ON"
    • Engine cylinder event counter is greater than 20
    • Engine coolant temp. is greater than 50 °C (122°F)
    • ETC Power Control Mode is Normal
Threshold Value
  • Throttle opening is less than 40%
  • MAP/BARO is less than 0.89
  • Difference of TPS1 flow and real flow is less than -0.4 or greater than 0.4
Diagnostic Time
  • 1.58 sec.
MIL On Condition
  • 1 Driving cycle