DTC Description

The purpose of this diagnosis is to detect a stuck oil temperature signal or implausibly low, high signal. For the stuck signal detection, the ECM checks whether after a variation of the calculated oil temperature also a variation of the measured oil temperature is detected and sets DTC P0196 if the variation of the measured oil temperature is lower than the threshold. For the implausibly high, low signal detection, the ECM compares measured engine oil temperature with calculated oil temperature or coolant temperature and sets DTC P0196 when one of following conditions is met.

1. Measured oil temperature is implausibly low when calculated oil temperature is high.
2. Measured oil temperature is implausibly high when coolant is low without any relevant failure.
3. Measured oil temp. < threshold but calculated oil temp. > threshold