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Engine-Codes – Mercury – B19A6 Mercury

B19A6 Mercury Code - Passenger Seat Back Blower Speed Short To Ground

Quick Answer

The B19A6 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the passenger seat back blower speed short to ground. Common causes include Wiring issues such as frayed or damaged wires, Faulty blower motor, Defective blower speed control module. 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
B19A6 Mercury indicates Passenger Seat Back Blower Speed Short To Ground.
Common causes
Common causes include Wiring issues such as frayed or damaged wires, Faulty blower motor, Defective blower speed control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code B19A6 Mercury Description

The B19A6 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the passenger seat back blower speed short to ground. This means that there is an electrical issue causing the blower speed for the passenger seat back to malfunction and short circuit to the ground, disrupting the proper operation of the blower system.

OBDII Code B19A6 Mercury - Passenger Seat Back Blower Speed Short To Ground
B19A6 Mercury Code - Passenger Seat Back Blower Speed Short To Ground

Common Causes of B19A6 Mercury

  1. Wiring issues such as frayed or damaged wires.
  2. Faulty blower motor.
  3. Defective blower speed control module.
  4. Poor ground connection.
  5. Electrical short circuit.

Symptoms of B19A6 Mercury

  1. Lack of airflow in the passenger seat back area.
  2. Inconsistent or erratic blower speed for the passenger seat back.
  3. Strange noises coming from the blower motor.
  4. Burning smell or smoke coming from the passenger seat area.
  5. Malfunctioning climate control system.

How to Fix B19A6 Mercury

  1. Begin by conducting a thorough inspection of the wiring harness for any visible damage. Repair or replace any damaged wires.
  2. Test the blower motor for proper operation and replace if necessary.
  3. Check the blower speed control module for any faults and replace if needed.
  4. Inspect the ground connection for corrosion or looseness and repair as required.
  5. Clear the diagnostic trouble code from the vehicle's computer system and test the blower system to ensure proper functionality.

Cost to Fix B19A6 Mercury

The cost of repairing a passenger seat back blower speed short to ground issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay anywhere from $150 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate based on location, vehicle make and model, and engine type. It's recommended to get quotes from multiple shops to ensure you're getting a fair price for the repair.

Need more information about the B19A6 Mercury code?

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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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.

Frequently Asked Questions about B19A6 Mercury Code

1. What does OBDII code B19A6 mean on a Mercury vehicle?

B19A6 indicates a short to ground in the passenger seat back blower speed circuit, which controls airflow for the seat's ventilation system.

2. What are the common symptoms of code B19A6 in a Mercury?

Symptoms may include the passenger seat back blower not functioning, reduced seat ventilation, or the climate control system displaying a fault.

3. What causes the B19A6 code to appear?

Common causes include damaged wiring, a shorted blower motor, a defective seat ventilation module, or a ground fault in the electrical circuit.

4. How can I diagnose the B19A6 code?

Inspect the wiring and connectors for damage or corrosion, test the blower motor for proper operation, and check for continuity or shorts in the circuit with a multimeter.

5. Can I drive my Mercury with the B19A6 code active?

Yes, you can drive the vehicle, but seat ventilation functionality may be impaired, and the electrical short could potentially cause further issues if not addressed.

6. How do I fix the B19A6 code on my Mercury?

Repairs may involve replacing damaged wiring, fixing any shorts to ground, or replacing the passenger seat back blower motor or ventilation module.

7. How much does it cost to repair the B19A6 code?

Repair costs vary, but fixing damaged wiring may cost $100–$300, while replacing a blower motor or module could range from $200–$500, depending on labor rates and parts.

8. Could a blown fuse cause the B19A6 code?

A blown fuse is not a direct cause of the code, but a ground fault or short circuit in the blower speed circuit could lead to a blown fuse.

9. How do I prevent the B19A6 code from returning?

Regularly inspect and maintain the seat ventilation system, ensure wiring is secure and undamaged, and address electrical issues promptly.

10. Do I need professional help to fix the B19A6 code?

While experienced DIYers can handle basic repairs, a professional mechanic may be needed for complex diagnostics or if specialized tools are required.

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