B0173
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.
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.
Common causes
- high
Inlet door actuator failed
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-550
- medium
Inlet door mechanically binding
A plausible cause — test and verify before replacing parts.
Typical part cost: $90-550
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does B0173 mean?
B0173 means "HVAC Air Inlet Door". It is a generic OBD-II code that points to a fault in the body.
What are the most common causes of B0173?
inlet door actuator failed; inlet door mechanically binding — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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