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Engine-Codes – Mercury – B2919 Mercury

B2919 Mercury Code - Auxiliary Blower Motor Speed Input Circuit Short To Voltage

Quick Answer

The B2919 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the auxiliary blower motor speed input circuit shorting to voltage. Common causes include Short circuit in the auxiliary blower motor speed input wiring, Faulty blower motor speed control module, Corrosion or damage to electrical connectors. 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
B2919 Mercury indicates Auxiliary Blower Motor Speed Input Circuit Short To Voltage.
Common causes
Common causes include Short circuit in the auxiliary blower motor speed input wiring, Faulty blower motor speed control module, Corrosion or damage to electrical connectors.
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 13, 2024
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Code B2919 Mercury Description

The B2919 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the auxiliary blower motor speed input circuit shorting to voltage. This means that there is an issue with the electrical circuit that controls the speed of the auxiliary blower motor, which is responsible for providing additional airflow in the vehicle's HVAC system. When this circuit shorts to voltage, it can disrupt the normal operation of the blower motor, leading to potential performance issues with the heating, ventilation, and air conditioning system.

OBDII Code B2919 Mercury - Auxiliary Blower Motor Speed Input Circuit Short To Voltage
B2919 Mercury Code - Auxiliary Blower Motor Speed Input Circuit Short To Voltage

Common Causes of B2919 Mercury

  1. Short circuit in the auxiliary blower motor speed input wiring
  2. Faulty blower motor speed control module
  3. Corrosion or damage to electrical connectors
  4. Issues with the HVAC control unit
  5. Electrical system malfunctions

Symptoms of B2919 Mercury

  1. Inconsistent airflow from the HVAC vents
  2. Unusual noises coming from the blower motor
  3. HVAC system not responding to speed adjustments
  4. Reduced heating or cooling performance
  5. Dashboard warning light illuminated

How to Fix B2919 Mercury

  1. Begin by conducting a thorough inspection of the auxiliary blower motor speed input circuit to identify any visible damage or signs of a short circuit.
  2. Test the blower motor speed control module and replace it if found to be faulty.
  3. Check and clean any corroded or damaged electrical connectors in the circuit.
  4. Inspect the HVAC control unit for any malfunctions and address any issues found.
  5. Clear the DTC from the vehicle's computer system and test the HVAC system to ensure proper operation.

Cost to Fix B2919 Mercury

The typical repair costs for addressing a B2919 DTC related to the auxiliary blower motor speed input circuit shorting to voltage can range from $150 to $400, including parts and labor. However, it is important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to check local rates for a more precise estimate before proceeding with the repair.

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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 B2919 Mercury Code

1. What are the common symptoms of OBDII code B2919 Mercury (Auxiliary Blower Motor Speed Input Circuit Short To Voltage)?

- The common symptoms include the auxiliary blower motor not functioning properly, erratic blower motor speed, and possibly a blown fuse.

2. What are the potential causes of OBDII code B2919 Mercury?

- The code B2919 can be caused by a short to voltage in the auxiliary blower motor speed input circuit, a faulty blower motor speed control module, or damaged wiring.

3. How can I diagnose the OBDII code B2919 Mercury?

- To diagnose the code B2919, you can use a scan tool to read the code and perform a visual inspection of the wiring and connectors related to the auxiliary blower motor.

4. What are some repair tips for OBDII code B2919 Mercury?

- Repair tips for code B2919 may include checking and repairing any damaged wiring, replacing the blower motor speed control module if faulty, and ensuring all connectors are secure.

5. Can I drive my vehicle with OBDII code B2919 Mercury?

- It is not recommended to drive your vehicle with the code B2919 present, as it can affect the operation of the auxiliary blower motor, which is important for climate control and defogging.

6. How serious is OBDII code B2919 Mercury?

- While code B2919 is not a critical issue that will prevent your vehicle from running, it can affect the comfort and safety of your driving experience, especially in extreme weather conditions.

7. How much does it typically cost to repair OBDII code B2919 Mercury?

- The cost of repairing OBDII code B2919 can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can I reset OBDII code B2919 Mercury without fixing the underlying issue?

- While you can clear the code temporarily, it will likely return if the underlying issue is not addressed. It is recommended to diagnose and repair the problem to prevent further issues.

9. Will OBDII code B2919 Mercury cause my check engine light to illuminate?

- Yes, OBDII code B2919 can trigger the check engine light to illuminate on your dashboard, indicating a fault with the auxiliary blower motor speed input circuit.

10. How long does it typically take to repair OBDII code B2919 Mercury?

- The repair time for code B2919 can vary depending on the extent of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours for a professional mechanic to diagnose and fix the problem.

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