Inspection Procedure

HINT:

• If DTCs "P0115, P0116, P0117, P0118 and P0125" are output simultaneously, engine coolant temperature sensor circuit may be open or short. Perform the troubleshooting of DTC "P0115, P0117 or P0118" first.
• 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 DTCS OUTPUT(IN ADDITION TO DTC P0125) 
   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 / OBD/MOBD / DTC INFO / CURRENT CODES".
   4. Read the DTCs using the hand-held tester or the OBD II scan tool.

   Result: 

   HAND-HELD TESTER DTC RESULT
   
   

   Display (DTC output)	Proceed to
   Only "P0125" is output	A
   "P0125" and other DTCs are output	B

   HINT:

   If any other codes besides "P0125" is output, perform the troubleshooting for those DTCs first.

   1. B : GO TO RELEVANT DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART   ) 
   2. A : Go to next step. 
2. INSPECT THERMOSTAT (See  INSPECTION  ) 
   1. NG : REPLACE THERMOSTAT (See  THERMOSTAT  ) 
   2. OK : REPLACE ENGINE COOLANT TEMPERATURE SENSOR