DTC P0195-15: Engine Oil Temperature Sensor Circuit Short to Battery or Open [11/2021 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)
*1 Engine Oil Temperature Sensor *2 ECM *a Front view of wire harness connector
(to Engine Oil Temperature Sensor)- - - Disconnect the engine oil temperature sensor connector.
- Connect terminals 1 (THEO) and 2 (E2) of the engine oil temperature sensor connector on the wire harness side.
- According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
Tester Display Engine Oil Temperature Sensor OK
GTS Display Specified Condition Engine Oil Temperature Sensor Higher than 170°C (338°F) Result
Proceed to OK NG
Result:
OK
REPLACE ENGINE OIL TEMPERATURE SENSOR. Refer to REMOVAL [11/2021 - ]
Result:
NG
See step 2
- CHECK HARNESS AND CONNECTOR (ENGINE OIL TEMPERATURE SENSOR - ECM)
- Disconnect the engine oil temperature sensor connector.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition B12-1 (THEO) - B49-99 (THEO) Always Below 1 Ω B12-2 (E2) - B49-100 (EPEO) Always Below 1 Ω B12-1 (THEO) or B49-99 (THEO) - Other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR