OBD Guide
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B297C

Driver Blend Door Actuator Drive Circuit Open

B297C is an OBD-II diagnostic trouble code meaning: Driver Blend Door Actuator Drive Circuit Open. Common causes: open or short circuit in wiring harness, damper motor malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Inability to adjust temperature on driver's side
  • Constant supply of only hot or only cold air
  • Clicking or unusual noises from the damper area

Causes

  • Open or short circuit in wiring harness
  • Damper motor malfunction
  • Problems with connectors or contacts
  • Malfunction of the climate control control unit

How to Fix

  1. Check the integrity of the wiring harness to the drive
  2. Check power and control signals at the drive connector
  3. Test the damper drive (winding resistance, mechanical part)
  4. If necessary, replace the drive or repair the wiring harness
  5. Reset the error and check the system operation

Related codes

B297DB297BB297A

FAQ

What does the B297C code mean?

B297C is an OBD-II diagnostic trouble code that indicates: Driver Blend Door Actuator Drive Circuit Open

What causes a B297C error code?

The most common causes of B297C include: Open or short circuit in wiring harness; Damper motor malfunction; Problems with connectors or contacts; Malfunction of the climate control control unit.

How do I fix a B297C diagnostic trouble code?

To fix B297C: Check the integrity of the wiring harness to the drive. Check power and control signals at the drive connector. Test the damper drive (winding resistance, mechanical part). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B297C?

Limited driving only, diagnose soon

How much does it cost to fix B297C?

The estimated repair cost for B297C is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat