OBD Guide
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B10A5

Left Blend Door 1 Control Circuit Open

B10A5 is an OBD-II diagnostic trouble code meaning: Left Blend Door 1 Control Circuit Open. Common causes: broken or damaged wiring, damper motor 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 temperature adjustment on the left side of the cabin
  • Lack of response to changing climate control settings
  • Constant flow of hot or cold air on one side

Causes

  • Broken or damaged wiring
  • Damper motor malfunction
  • Problems in the climate control control unit
  • Oxidation of contacts in connectors

How to Fix

  1. Check the integrity of the wiring in the damper control circuit
  2. Check the functionality of the damper motor
  3. Check the contacts in the connectors for oxidation
  4. If necessary, replace the motor or wiring
  5. Reset the error and check the system operation

Related codes

B10A6B10A4B10A7

FAQ

What does the B10A5 code mean?

B10A5 is an OBD-II diagnostic trouble code that indicates: Left Blend Door 1 Control Circuit Open

What causes a B10A5 error code?

The most common causes of B10A5 include: Broken or damaged wiring; Damper motor malfunction; Problems in the climate control control unit; Oxidation of contacts in connectors.

How do I fix a B10A5 diagnostic trouble code?

To fix B10A5: Check the integrity of the wiring in the damper control circuit. Check the functionality of the damper motor. Check the contacts in the connectors for oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B10A5?

Yes, but get it checked soon

How much does it cost to fix B10A5?

The estimated repair cost for B10A5 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat