B0622moderate severityBody
Blend Door Actuator Circuit - Driver Side
on 2006 Lexus LS 430 4.3L V8 · RWD
What this code means
Malfunction in the driver side blend door (temperature mix) actuator. The blend door controls the mix of hot and cold air.
Symptoms
- Driver side blows only hot or only cold air
- Temperature does not change with control adjustment
- Clicking noise from behind dashboard
- Inconsistent temperature delivery
Common causes
- Faulty blend door actuator motor
- Blend door binding or broken
- Actuator gear stripped
- Wiring issue
- HVAC control module fault
Diagnostic steps
- Listen for actuator operation when changing temp
- Test actuator with direct power
- Check actuator gears for stripping
- Inspect blend door for binding
- Scan HVAC module for codes
Repair notes
Replace blend door actuator. If door is broken, dash removal may be required for door replacement.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0007
Rear Left Side Airbag Deployment Circuit
B0008
Rear Right Side Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open