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Home >> Lexus >> 2010 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0351-U0101) & Circuit Tests) >> SFI System >> DTC P2121: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance >> Procedure
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DTC P2121: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance: Procedure

  1. CHECK OTHER DTC OUTPUT 

    Result

    Result Proceed to
    P2121 A
    P2121 and other DTCs B

    B → See step   5 

    A: Go to next step 

  2. REPLACE ACCELERATOR PEDAL 

    NEXT: Go to next step 

  3. CHECK OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTCS ARE OUTPUT AGAIN) 
    1. Clear DTCs. Refer to DTC CHECK / CLEAR .
    2. Refer to the confirmation driving pattern for P2121.
    3. Read the DTCs.

      Result

      Result Proceed to
      P2121 A
      No output B

    B → See step   6 

    A → See step   4 

  4. REPLACE ECM. Refer to  REMOVAL 
  5. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS