Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester or OBD II scan tool. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0121) 
   1. Connect an intelligent tester to the DLC3.
   2. Turn the ignition switch ON.
   3. Turn the tester ON.
   4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   5. Read DTCs.

      Result 

      ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0121)
      
      

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

      HINT:

      If any DTCs other than P0121 are output, troubleshoot those DTCs first.

   B: GO TO  DIAGNOSTIC TROUBLE CODE CHART  

   A: REPLACE THROTTLE BODY ASSEMBLY