General Information

Engine Control
P0197 Engine Oil Temperature Sensor Low Input - General Information

Component Location





General Description

The fluid of the CVVT is the engine oil and its density changes according to the engine oil temperature. At this time the Oil Temperature Sensor (OTS) helps compensation against the temperature differences. The Oil Temperature Sensor measures the engine oil temperature before the engine oil comes into the Oil-flow Control Valve (OCV).
According to the measured temperature, the Engine Control Module (PCM) compensates the oil-flow control valve operation time.

DTC Description

Checking output signals from oil temperture sensor every 15 sec. under detecting condition, if an signal is low for more than 12.5 sec., PCM sets P0197.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data












Fig.1) Normal data of IATS & ECTS & EOTS at ig on.
Fig.2) Normal data of IATS & ECTS & EOTS after warming up.
Fig.3) Normal waveform of EOTS.