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B0166 Body

HVAC Discharge Air Temperature Sensor

The HVAC control module reports an implausible signal from the discharge (vent outlet) air temperature sensor. This sensor verifies that the actual outlet air temperature matches the commanded value.

Affected components

  • Discharge air temp sensor
  • Hvac control module

Common causes

  • High likelihood: Discharge air temp sensor failed
  • Medium likelihood: Wiring or connector fault

Possible symptoms

  • Warning light or symbol related to the affected system
  • Comfort or safety function impaired

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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