Inspection Procedure

HINT:

Read freeze frame data using the hand held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

1. CHECK OTHER DTC OUTPUT (IN ADDITION P0121) 
   1. Connect the hand held tester or the OBD II scan tool to the DLC3.
   2. Turn the ignition switch ON and push the hand held tester or the OBD II scan tool main switch ON.
   3. Select the item "DIAGNOSIS/ENHANCED OBD II/DTC INFO/CURRENT CODES."
   4. Read the DTCs.

      Result: 

      DTC OUTPUT DISPLAY
      
      

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

      HINT:

      If any other codes besides P0121 is output, perform the troubleshooting for those DTCs first.

   1. B: REPLACE THROTTLE POSITION SENSOR 
   2. A: GO TO RELEVANT DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART  )