Engine-CodesChevrolet – B1845 2014 Chevrolet Silverado

B1845 2014 Chevrolet Silverado Code - Driver Seat Lumbar Down Switch Circuit

Quick Answer

The B1845 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado relates to the driver seat lumbar down switch circuit. Common causes include Faulty lumbar support switch, Wiring issues such as frayed or damaged wires, 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
B1845 2014 Chevrolet Silverado indicates Driver Seat Lumbar Down Switch Circuit.
Common causes
Common causes include Faulty lumbar support switch, Wiring issues such as frayed or damaged wires, 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 Sep 17, 2024
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Code B1845 2014 Chevrolet Silverado Description

The B1845 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado relates to the driver seat lumbar down switch circuit. This code indicates that there is a malfunction in the circuit that controls the lumbar support adjustment in the driver's seat. The lumbar support feature is designed to provide additional lower back support and comfort for the driver. When this circuit is not functioning properly, it can affect the driver's comfort level while driving, potentially leading to discomfort and fatigue.

OBDII Code B1845 2014 Chevrolet Silverado - Driver Seat Lumbar Down Switch Circuit
B1845 2014 Chevrolet Silverado Code - Driver Seat Lumbar Down Switch Circuit

Common Causes of B1845 2014 Chevrolet Silverado

  1. Faulty lumbar support switch.
  2. Wiring issues such as frayed or damaged wires.
  3. Loose or corroded electrical connections.
  4. Malfunctioning lumbar support motor.
  5. Issues with the control module that manages the lumbar support function.

Symptoms of B1845 2014 Chevrolet Silverado

  1. Inability to adjust the lumbar support in the driver's seat.
  2. Lumbar support moving in the wrong direction or getting stuck.
  3. Illumination of the airbag warning light on the dashboard.
  4. Intermittent issues with the lumbar support function.
  5. Unresponsive or non-functional lumbar support switch.

How to Fix B1845 2014 Chevrolet Silverado

  1. Begin by conducting a visual inspection of the lumbar support switch, wiring, and connections to identify any visible damage or issues.
  2. Use a multimeter to test the continuity of the circuit and check for any shorts or open circuits.
  3. If the lumbar support switch is found to be faulty, replace it with a new one.
  4. Inspect and repair any damaged wiring or connectors in the circuit.
  5. If the issue persists, further diagnostics may be required to identify the root cause, such as testing the lumbar support motor or control module.

Cost to Fix B1845 2014 Chevrolet Silverado

The cost of repairing the driver seat lumbar down switch circuit can vary depending on the specific cause of the issue. In general, the cost of parts such as a new lumbar support switch or wiring repairs can range from $50 to $200. Labor costs at an auto repair shop typically range from $80 to $150 per hour. The total cost of the repair, including parts and labor, could range from $100 to $500 or more. It's recommended to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair needed for your 2014 Chevrolet Silverado.

Tech Notes for B1845 2014 Chevrolet Silverado









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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 B1845 2014 Chevrolet Silverado Code

1. What does the OBDII code B1845 mean for a 2014 Chevrolet Silverado?

The code B1845 indicates an issue with the driver seat lumbar down switch circuit, such as an open, short, or malfunction in the electrical wiring or components.

2. What are the symptoms of code B1845 in a 2014 Chevrolet Silverado?

Symptoms may include the lumbar support not moving downward as expected, limited seat adjustment functionality, or no response when the lumbar down switch is pressed.

3. What causes the B1845 code in a 2014 Chevrolet Silverado?

Common causes include a faulty lumbar down switch, damaged wiring or connectors in the circuit, or an issue with the seat control module.

4. Can I still drive my Silverado with the B1845 code?

Yes, the vehicle is still drivable, but the lumbar adjustment feature for the driver seat may not work properly, potentially impacting comfort.

5. How do I diagnose a B1845 code in my Silverado?

Start by inspecting the lumbar down switch, wiring, and connectors for damage or loose connections. Use a scan tool to verify the code and test the seat control module functionality.

6. How can I fix the B1845 code in my 2014 Chevrolet Silverado?

Repairs may involve replacing the lumbar down switch, repairing damaged wiring or connectors, or reprogramming or replacing the seat control module if necessary.

7. Is the B1845 code a common issue in the 2014 Silverado?

While not extremely common, issues with the lumbar adjustment system do occur and can trigger this code, especially in vehicles with heavy seat usage.

8. How much does it cost to repair the B1845 code?

Repair costs can vary depending on the issue. Replacing a switch may cost around $50–$150, while more extensive repairs involving wiring or modules could be more expensive.

9. Can I reset the B1845 code without fixing the problem?

Clearing the code with a scan tool may temporarily remove it, but if the underlying issue isn’t resolved, the code will likely return.

10. Does the B1845 code affect other seat functions?

In most cases, this code specifically affects the lumbar down adjustment. However, if the issue lies in the seat control module, it might impact other seat functions as well.

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