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Home >> Lexus >> 2009 >> IS 250 AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (DTCS P0010 - P0368) >> SFI System >> DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem >> Procedure
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DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem: Procedure

  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0121) 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the tester on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    5. Read the DTC.

      Result

      Display (DTC output) Proceed to
      P0121 A
      P0121 and other DTCs B

    B → GO TO DTC CHART 

    A → REPLACE THROTTLE BODY