Code
B1267
Other
B — Body
Servo Motor Airintake Right Circuit Failure
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in the servo motor harness
- Poor or corroded connector or terminal at servo motor
- Blown fuse or interrupted power supply to the actuator circuit
- Failed servo motor (internal winding or brush failure)
- Faulty control module or driver transistor
- Restricted movement or mechanical binding of the air flap
Symptoms
- Right intake/vent flap does not move or is stuck in one position
- Incorrect air distribution from vents (no/low airflow to right side vents)
- Noise from actuator (grinding, clicking) during operation
- HVAC system reports vent selection faults or shows actuator position errors
- DTC B1267 stored and may trigger a message or reduced HVAC function
What to check
- Connect a scan tool; read B1267 and any related HVAC codes and freeze-frame data
- Verify battery voltage and main HVAC power supply fuses/relays
- Visually inspect harness and connector at right intake servo for damage, corrosion, or water
- Check for mechanical obstruction or seized flap by manually moving linkage if accessible
- Backprobe servo connector to measure power, ground, and control signal with ignition on and HVAC operating
- Wiggle harness and connector while monitoring live data to look for intermittent faults
Signal parameters
- Supply voltage at actuator (nominal battery voltage with ignition ON, typically ~12 V)
- Ground continuity to chassis ground (near 0 ohms expected)
- Control signal type: PWM duty cycle or variable voltage (measure frequency and duty with scope or multimeter if applicable)
- Actuator feedback/position sensor voltage or resistor value (varies by design; check service data)
- Coil resistance of motor windings (compare to spec; open or short indicated by extreme values)
Diagnostic algorithm
- Retrieve trouble codes and freeze-frame data with a scan tool; note related HVAC codes.
- Visually inspect the right intake servo, connectors, and wiring for corrosion, damage, or water ingress.
- Verify fuses and relays for the HVAC/actuator power circuit; replace if blown.
- With harness connected, backprobe connector: confirm battery supply at the power pin and good ground at the ground pin.
- Command the right intake servo using the scan tool (actuator test) while monitoring power, ground and control signal; observe movement and listen for abnormal noises.
- If no power or bad ground, trace wiring to the fuse/relay and control module; repair open or high-resistance connections.
- If control signal is absent or abnormal, test the HVAC control module output stage; compare with an identical functioning actuator circuit if possible.
- If power and control signals are correct but actuator does not move or shows incorrect feedback, remove and bench-test or replace the servo motor and re-check resistance/operation.
- Inspect and free any mechanically binding flaps or linkages; lubricate or repair as needed.
- After repair or replacement, clear codes, perform actuator calibration/learn procedure with scan tool, then verify correct operation and that B1267 does not return.
Likely causes
- Connector at right intake servo is loose/corroded
- Motor windings open or shorted due to wear or water intrusion
- Ground wire disconnected or high-resistance connection
- Wiring chafed and shorted to vehicle body or power
- HVAC control module driver stage has failed
- Air flap linkage seized or obstructed preventing movement
Fault status
Status
Servo Motor Air Intake Right Circuit Failure — electrical or actuator fault detected on the right intake/air flap actuator circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
Similar codes
Repair manuals
Brands with available manuals
7,705
The library contains 7,705 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email