astra22bertoneauto gp55 said: where about is the sensor that i dont know sorry, someone else mite know on here. On my old MK2 astra it was connected to the housing of the coolant thermostat. not needed to change the thermostat or check the sensor yet on the mk4
MikeS sensor is in thermostat housing where most cts are thermostat housing is behind egr valve at the back of the head 2 pin sensor on the housing is cts cts controls fueling for engine & dash gauge
MikeS old fashion coolant sensor has a round connection on the end this is a standard 2 pin connection