DTC P0115-15: Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open [12/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

Refer to DTC P0115-11.

Refer to DESCRIPTION

HINT:

When DTC P0115-15 is stored, the ECM enters fail-safe mode. During fail-safe mode, the engine coolant temperature is estimated to be 80°C (176°F) by the ECM. Fail-safe mode continues until a pass condition is detected.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
P0115-15	Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open	The engine coolant temperature sensor output voltage is higher than 4.91 V for 0.5 seconds or more (1 trip detection logic).	Open or short in engine coolant temperature sensor circuit Engine coolant temperature sensor ECM	Comes on	Engine	A	SAE Code: P0118

HINT:

When a DTC is output, check the Data List item "Coolant Temperature" using the GTS.

Refer to DATA LIST / ACTIVE TEST [12/2023 - ]

DTC No.	Coolant Temperature	Malfunction
P0115-15	-40°C (-40°F)	Short to +B in THW circuit Open in THW circuit Open in ETHW circuit

If the Data List value is normal it may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.