Engine-CodesGeneric – B1D29

B1D29 Code - Mirror Motor Common Control Circuit Open

Quick Answer

The B1D29 diagnostic trouble code indicates that there is an open circuit in the mirror motor common control circuit. Common causes include Faulty mirror motor, Broken or damaged wiring in the mirror motor circuit, Loose or corroded electrical connections. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1D29 indicates Mirror Motor Common Control Circuit Open.
Common causes
Common causes include Faulty mirror motor, Broken or damaged wiring in the mirror motor circuit, Loose or corroded electrical connections.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code B1D29 Description

The B1D29 diagnostic trouble code indicates that there is an open circuit in the mirror motor common control circuit. This means that there is a break or discontinuity in the electrical wiring or connections that control the mirror motor, preventing it from functioning properly. The mirror motor is responsible for adjusting the position of the side mirrors on the vehicle. If left unresolved, this issue can result in the side mirrors being stuck in one position, making it difficult for the driver to properly adjust them for visibility. In some cases, it may also affect other functions of the mirror, such as folding or heating features.

OBDII Code B1D29 - Mirror Motor Common Control Circuit Open
B1D29 Code - Mirror Motor Common Control Circuit Open

Common Causes of B1D29

  1. Faulty mirror motor
  2. Broken or damaged wiring in the mirror motor circuit
  3. Loose or corroded electrical connections
  4. Defective mirror control switch
  5. Water damage or corrosion in the mirror assembly

Symptoms of B1D29

  1. Side mirrors not responding to control inputs
  2. Side mirrors stuck in one position
  3. Inability to adjust side mirrors
  4. Mirror folding or heating functions not working
  5. Dashboard warning light related to mirror system

How to Fix B1D29

  1. Inspect the mirror motor and wiring for any visible damage or corrosion.
  2. Test the mirror motor and control switch for proper functionality using a multimeter.
  3. Repair or replace any damaged wiring or connectors in the mirror motor circuit.
  4. Replace the mirror motor if it is found to be faulty.
  5. Clear the diagnostic trouble codes from the vehicle's memory and test the mirror system for proper operation.

Cost to Fix B1D29

The cost of repairing a mirror motor common control circuit open issue can vary depending on the specific cause of the problem and the make and model of the vehicle. In general, the cost of parts for this repair can range from $100 to $300, while the labor cost can range from $80 to $150 per hour. Overall, the total repair cost for this issue is typically between $150 and $500. Keep in mind that additional diagnostic time and labor charges may apply, so it's best to consult with a professional technician for an accurate estimate.

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Code B1D29 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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