DTC P0115-2A: Engine Coolant Temperature Sensor 1 Signal Stuck in Range [03/2024 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 250, 2024 Lexus NX 250, 2023 Lexus NX 250, and 2022 Lexus NX 250. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0115-2A)
- Read the DTCs.
Powertrain > Engine > Trouble Codes
Result
Result Proceed to DTC P0115-2A is output A DTC P0115-2A and other DTCs are output B HINT:
If any DTCs other than P0115-2A are output, troubleshoot those DTCs first.
Result:
B
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2024 - ]
Result:
A
See step 2
- Read the DTCs.
- INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY
- Inspect the water inlet with thermostat sub-assembly (thermostat opening temperature).
Refer to INSPECTION [11/2021 - ]
HINT:
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.
Refer to INITIALIZATION [11/2021 - ]
Result
Proceed to OK NG
Result:
OK
REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY. Refer to REMOVAL [11/2021 - ]
- Inspect the water inlet with thermostat sub-assembly (thermostat opening temperature).