OBD Guide
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B13AB

Air Mix Actuator Circuit

B13AB is an OBD-II diagnostic trouble code meaning: Air Mix Actuator Circuit. Common causes: open or short circuit in the actuator circuit, mechanical jamming of the actuator. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect air distribution in the cabin
  • Climate control does not respond to commands
  • Damper jamming
  • Noises when operating the climate control system

Causes

  • Open or short circuit in the actuator circuit
  • Mechanical jamming of the actuator
  • Malfunction of the climate control control unit
  • Wiring harness damage
  • Contact corrosion

How to Fix

  1. Check the integrity of the air mixing actuator circuit
  2. Check the operation of the actuator for jamming
  3. Inspect the contacts and wiring harness for damage.
  4. If necessary, replace the actuator or repair the chain
  5. Reset the error and check the system operation

Related codes

B13AAB13ACB13AD

FAQ

What does the B13AB code mean?

B13AB is an OBD-II diagnostic trouble code that indicates: Air Mix Actuator Circuit

What causes a B13AB error code?

The most common causes of B13AB include: Open or short circuit in the actuator circuit; Mechanical jamming of the actuator; Malfunction of the climate control control unit; Wiring harness damage.

How do I fix a B13AB diagnostic trouble code?

To fix B13AB: Check the integrity of the air mixing actuator circuit. Check the operation of the actuator for jamming. Inspect the contacts and wiring harness for damage.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B13AB?

Yes, but get it checked soon

How much does it cost to fix B13AB?

The estimated repair cost for B13AB is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat