DTC 00766: Front Vent Temperature Sensor Circuit
WARNING: This page is about a different car, the 2003 Volkswagen EuroVan and 2002 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.
Check front vent temperature sensor. See READING MEASURING VALUE BLOCK under SYSTEM TESTS. If DTCs for outside air temperature sensor, sunlight photo sensor and A/C engine coolant temperature sensor also exist, check wiring and connectors between CCM and sensors. If wiring and connectors are okay, replace front vent temperature sensor.