OBD Guide
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B13AA

Air Mix Actuator Motor Lock

B13AA is an OBD-II diagnostic trouble code meaning: Air Mix Actuator Motor Lock. Common causes: mechanical damper lock, drive motor wear. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Inability to adjust the temperature in the cabin
  • Uneven airflow from deflectors
  • Clicking or knocking noises from the climate control area

Causes

  • Mechanical damper lock
  • Drive motor wear
  • Wiring Harness Problems
  • Malfunction of the climate control control unit

How to Fix

  1. Check the mechanical movement of the damper
  2. Diagnose the drive motor
  3. Check the integrity of the wiring harness
  4. Replace drive motor if necessary

Related codes

B13ABB13ACB13AD

FAQ

What does the B13AA code mean?

B13AA is an OBD-II diagnostic trouble code that indicates: Air Mix Actuator Motor Lock

What causes a B13AA error code?

The most common causes of B13AA include: Mechanical damper lock; Drive motor wear; Wiring Harness Problems; Malfunction of the climate control control unit.

How do I fix a B13AA diagnostic trouble code?

To fix B13AA: Check the mechanical movement of the damper. Diagnose the drive motor. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B13AA?

Yes, but get it checked soon

How much does it cost to fix B13AA?

The estimated repair cost for B13AA is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat