DTC P0197-00: Engine Oil Temperature Sensor Low Input: General Description

The Continuously Variable Valve Timing (CVVT) system uses engine oil pressure to change the camshaft timing according to engine operating conditions. Engine oil viscosity changes according to engine temperature. The Oil Temperature Sensor (OTS) signal along with coolant and intake air temperature is used by the ECM to compensate for changes in oil viscosity when commanding the Oil Control Valve (OCV). The Engine Oil Temperature Sensor (EOTS) measures the engine oil temperature before the engine oil flows through the OCV.