OBD-II code · Body
B0168 HVAC Air Mix Door Performance
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.
Is it safe to drive with B0168?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBlend door actuator motor failed
- PossibleBlend door mechanically binding or broken
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Air Mix Door Actuator, HVAC Control Module, Blend Door Linkage
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.