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Home >> Hyundai >> 2004 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> DTC Trouble Shooting Procedures >> DTC P0121: Throttle Position Sensor (TPS) Circuit Range/Performance Problem >> Inspection Procedures >> 3. Check TPS
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3. Check TPS

  1. Turn ignition switch to OFF position.
  2. Measure resistance between terminals 1 and 2 of the TPS.
  3. Measure resistance between terminals 2 and the 3 of TPS.
    Fig 1: Checking TPS Resistance
    G00749199Courtesy of HYUNDAI MOTOR CO.

Is resistance within specification? 

Yes: Go to next step.

No: Replace TPS.

Proceed with ECM problem procedure.