B0168

HVAC Air Mix Door Performance

Moderate severity

The HVAC control module has detected that the air mix (blend) door does not reach the commanded position within the expected time. The blend door regulates the ratio of air through the heater core versus around it.

Common causes

Blend door actuator motor failed
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $90-880
Blend door mechanically binding or broken
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $90-880
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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

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Frequently asked questions

What does B0168 mean?

B0168 means "HVAC Air Mix Door Performance". It is a generic OBD-II code that points to a fault in the body.

What are the most common causes of B0168?

blend door actuator motor failed; blend door mechanically binding or broken — 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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