OBD Guide
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B11C3

Front Mode Door 1 Travel Range Too Small

B11C3 is an OBD-II diagnostic trouble code meaning: Front Mode Door 1 Travel Range Too Small. Common causes: mechanical jamming of the damper, damper actuator malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect distribution of air flow in the cabin
  • Airflow modes do not switch
  • Clicking or strange sounds coming from under the instrument panel

Causes

  • Mechanical jamming of the damper
  • Damper actuator malfunction
  • Problems with the throttle position sensor
  • Open or shorted wiring harness
  • Control unit software error

How to Fix

  1. Check the mechanical movement of the damper
  2. Test the damper actuator
  3. Check the throttle position sensor
  4. Inspect the wiring harness for damage
  5. If necessary, replace faulty components
  6. Reflash the control unit (if required)

Related codes

B11C4B11C5B11C6

FAQ

What does the B11C3 code mean?

B11C3 is an OBD-II diagnostic trouble code that indicates: Front Mode Door 1 Travel Range Too Small

What causes a B11C3 error code?

The most common causes of B11C3 include: Mechanical jamming of the damper; Damper actuator malfunction; Problems with the throttle position sensor; Open or shorted wiring harness.

How do I fix a B11C3 diagnostic trouble code?

To fix B11C3: Check the mechanical movement of the damper. Test the damper actuator. Check the throttle position sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B11C3?

Yes, but get it checked soon

How much does it cost to fix B11C3?

The estimated repair cost for B11C3 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat