LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 25 (Engine Control System - Diagnostic Codes (P0115-P0136)) >> SFI System >> DTC P0115-2A: Engine Coolant Temperature Sensor 1 Signal Stuck in Range [10/2022 - 08/2023] >> Procedure

DTC P0115-2A: Engine Coolant Temperature Sensor 1 Signal Stuck in Range [10/2022 - 08/2023]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
  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 [10/2022 - 08/2023] 

    Result: 

    See step  2

  2. INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY 

    Refer to INSPECTION [10/2022 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [10/2022 - 08/2023] 

    Result: 

    NG 

    REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY. Refer to  REMOVAL [10/2022 - 08/2023]