Inspection Procedure

HINT:

• Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
• This DTC is related to the accelerator pedal position sensor.

1. CHECK OTHER DTC OUTPUT 

   Result 

   RESULT CHART
   
   

   Display (DTC output)	Proceed to
   P2121	A
   P2121 and other DTCs	B

   B: GO TO RELEVANT DTC CHART 

   A: Go to next step 

2. REPLACE ACCELERATOR PEDAL 
3. CHECK OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTCS ARE OUTPUT AGAIN) 
   1. Clear the DTCs (see DTC CHECK/CLEAR  ).
   2. Start the engine and allow the engine to idle for 15 seconds or more.
   3. Read DTCs.

      Result 

      RESULT CHART
      
      

      Display (DTC output)	Proceed to
      P2121	A
      No output	B

   B: CHECK INTERMITTENT PROBLEMS 

   A: REPLACE ECM