Originally Posted by Infinite
It depends. If the sensor is just reading off, it won't throw a code, the ecu will just accept whatever voltage the sensor outputs (normally between 0-5v) if the ecu doesn't see sensor feedback at all that's when it will throw a code.
Temp sensors are not a 0-5v but rather of the RTD or thermocouple variety which neither of these will give you 0-5v like a boost sensor. So it either relies on the resistance of the wire, or it is measuring millivolts of difference for the given temperature.