The discussion centers around the location of the crankshaft sensor in a 2006 Peugeot 1.6 HDI 90KM. It is identified that the sensor is located on the left side of the shaft pulley, which is responsible for driving the accessories belt. There is some confusion regarding its proximity to the reverse gear sensor, and a follow-up mentions the need for a camshaft sensor as well. A photo link is provided for visual reference. Summary generated by the language model.
