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Home >> Hyundai >> 2012 >> Elantra GLS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC P0121: Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance >> General Information >> DTC Detecting Condition
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General Information: DTC Detecting Condition

DTC DETECTING CONDITION

Item Detecting Condition Possible Cause
DTC Strategy
  • Plausibility check between TPS1 and TPS2
  1. Faulty TPS1
  2. Poor connection or damaged harness
Enable Conditions
  • No engine stop and engine start
  • No TPS adaptation request
  • No relevant failure
Threshold Value
  • An absolute value of TPS2 - TPS1 > 7.6%
Diagnostic Time
  • 0.3sec.
MIL On Condition
  • 1 Drive Cycle
Limp-Home
  • Forced limited power mode: When the DTC is set, the PCM reduces engine torque by 25% of normal value.
  • The PCM uses TPS2 signal to monitor the controlled opening angle of the throttle valve.
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