need help for my O2 sensor
as i mentioned in my previous post that my e36 328 engine light was on, and it turns out the O2 sensor not activated or someting... but my mechanician said might not be the O2 sensor problem because the O2 sensor will only activate when the engine is fully warm..
Also, another symptom is that when the car was on highway, the engine temperature when down to 45, on local was normal around 90 or 100
so, is this because of the bad thermostat? so i need replace thermostat first and see if this O2 sensor problem will fix?
any opinion would be appreciated!!