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Home >> Lexus >> 2022 >> LX 600 Premium >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (W/O Canister Pump Module) - Diagnostic Codes (2 Of 5) >> SFI SYSTEM (w/o Canister Pump Module) >> DTC P0115-2A: Engine Coolant Temperature Sensor 1 Signal Stuck in Range [12/2021 - ] >> Procedure
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DTC P0115-2A: Engine Coolant Temperature Sensor 1 Signal Stuck in Range [12/2021 - ]: Procedure

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0115-2A) 
    1. Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      P0115-2A and other DTCs are output A
      P0115-2A is output B

      HINT: 

      If any DTCs other than P0115-2A are output, troubleshoot those DTCs first.

    Result: 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2021 - ] 

    Result: 

    See step  2

  2. INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY 
    1. Inspect the water inlet with thermostat sub-assembly (thermostat opening temperature).

      Refer to INSPECTION [12/2021 - ]

      HINT: 

      Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

      Refer to INITIALIZATION [12/2021 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY. Refer to  REMOVAL [12/2021 - ]