Inspection Procedure

HINT:

Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).

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

      Result 

      RESULT CHART
      
      

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

   B: Go to DTC CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   A : REPLACE THROTTLE BODY  (See THROTTLE BODY )