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 to determine 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 the malfunction occurred.

1. Are there any other codes (besides DTC P0121) being output ? 

   PREPARATION: 

   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".

   CHECK: 

   Read the DTCs using the hand-held tester or the OBD II scan tool.

   Result: 

   DISPLAY (DTC OUTPUT) SPECIFICATION
   
   

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

   HINT:

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

   1. B: Go to relevant DTC chart (See  DIAGNOSTIC TROUBLE CODE CHART  ). 
   2. A: Replace throttle position sensor.