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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 70 (Engine Control System (A25A-FXS) - Diagnostic Codes (P0110-P0125)) >> SFI System >> DTC P0115-15: Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open [10/2022 - 11/2023] >> Description

DTC P0115-15: Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open [10/2022 - 11/2023]: Description

WARNING: This page is about a different variant/trim than selected.

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 Memory 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 DTC stored
  • SAE Code: P0118
  • DTC for Mexico Models: Applies

HINT: 

When this DTC is output, check the engine coolant temperature in the Data List. Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.

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.

Refer to CHECK FOR INTERMITTENT PROBLEMS [12/2019 - ]