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B0173 Body

HVAC Air Inlet Door

The HVAC control module has detected a fault on the fresh-air/recirculation inlet door — typically a stuck actuator or position feedback out of range.

Affected components

  • Air inlet door actuator
  • Hvac control module

Common causes

  • High likelihood: Inlet door actuator failed
  • Medium likelihood: Inlet door mechanically binding

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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