Engine-Codes.com
Engine-Codes – Chevrolet – B1845 2016 Chevrolet Silverado

B1845 2016 Chevrolet Silverado Code - Driver Seat Lumbar Down Switch Circuit

Quick Answer

The B1845 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado relates to the driver seat lumbar down switch circuit. Common causes include Faulty lumbar support switch, Damaged wiring or connectors in the circuit, Corrosion or poor connections in the circuit. 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 2016 Chevrolet Silverado indicates Driver Seat Lumbar Down Switch Circuit.
Common causes
Common causes include Faulty lumbar support switch, Damaged wiring or connectors in the circuit, Corrosion or poor connections in the circuit.
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 18, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B1845 2016 Chevrolet Silverado Description

The B1845 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado relates to the driver seat lumbar down switch circuit. This code indicates a malfunction in the circuit that controls the lumbar support adjustment in the driver's seat. The lumbar support feature allows the driver to adjust the lower back support to achieve a comfortable driving position. When this circuit is compromised, it can lead to the inability to adjust the lumbar support, potentially causing discomfort and affecting the driver's posture while driving.

OBDII Code B1845 2016 Chevrolet Silverado - Driver Seat Lumbar Down Switch Circuit
B1845 2016 Chevrolet Silverado Code - Driver Seat Lumbar Down Switch Circuit

Common Causes of B1845 2016 Chevrolet Silverado

  1. Faulty lumbar support switch.
  2. Damaged wiring or connectors in the circuit.
  3. Corrosion or poor connections in the circuit.
  4. Issues with the power supply to the circuit.
  5. Defective powertrain control module (PCM).

Symptoms of B1845 2016 Chevrolet Silverado

  1. Inability to adjust the lumbar support in the driver's seat.
  2. Lumbar support adjustment is erratic or inconsistent.
  3. Illumination of the airbag warning light on the dashboard.
  4. Intermittent loss of power to the driver's seat controls.
  5. Unusual noises coming from the seat when attempting to adjust the lumbar support.

How to Fix B1845 2016 Chevrolet Silverado

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the trouble codes and pinpoint the faulty component.
  2. Inspect the lumbar support switch, wiring, and connectors for any visible damage or corrosion. Replace any damaged components.
  3. Test the power supply to the circuit to ensure it is functioning correctly. Repair any issues with the power supply if necessary.
  4. Clear the DTCs from the PCM memory using the diagnostic scanner after completing the repairs.
  5. Test the driver seat lumbar down switch circuit to verify that the issue has been resolved and that the lumbar support can be adjusted properly.

Cost to Fix B1845 2016 Chevrolet Silverado

The cost of repairing the driver seat lumbar down switch circuit on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue and the cost of parts and labor. In general, the parts required for this repair, such as a new lumbar support switch or wiring harness, may range from $50 to $200. Labor costs at an auto repair shop can add an additional $100 to $300, depending on the shop's hourly rates and the complexity of the repair.

What does this mean?

Tech Notes for B1845 2016 Chevrolet Silverado









User Submitted Video

Need more information about the B1845 2016 Chevrolet Silverado code?

Need more information on how to fix the B1845 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1845 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2016 Chevrolet Silverado Code

1. What does OBDII code B1845 mean on a 2016 Chevrolet Silverado?

Code B1845 indicates an issue with the Driver Seat Lumbar Down Switch Circuit, which controls the lumbar support adjustment in the driver’s seat.

2. What are the common symptoms of code B1845 in a 2016 Chevrolet Silverado?

Common symptoms include the driver seat lumbar support not adjusting down, no response from the lumbar switch, or intermittent functionality.

3. What causes the B1845 code to appear?

The code is typically caused by a faulty lumbar down switch, damaged wiring or connectors in the circuit, or a malfunctioning seat module.

4. How can I diagnose the B1845 code in my Silverado?

Start by inspecting the lumbar down switch, wiring, and connectors for damage or corrosion. Use a scan tool to monitor the seat module and test the switch for proper function.

5. Can I still drive my truck with the B1845 code?

Yes, the truck is safe to drive, but the lumbar adjustment feature may not work properly, affecting seat comfort.

6. How do I fix the B1845 code on a 2016 Chevrolet Silverado?

Repairs may include replacing the lumbar down switch, repairing or replacing damaged wiring, or reprogramming or replacing the seat module.

7. How much does it cost to fix the B1845 code?

The cost varies depending on the repair, with switch replacement typically costing $50–$150 for parts and labor, while seat module repairs may cost $200–$500.

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

Clearing the code with a scan tool without addressing the root cause will likely result in the code returning as the issue persists.

9. Is the B1845 code a common issue in the 2016 Chevrolet Silverado?

While not extremely common, it can occur in vehicles with frequent seat adjustments or wear and tear on the lumbar system components.

10. Do I need professional help to fix the B1845 code?

If you’re comfortable with basic electrical diagnostics and repairs, you can attempt to fix it yourself. Otherwise, consult a professional mechanic for proper diagnosis and repair.

Discuss the causes and fixes for B1845 2016 Chevrolet Silverado OBDII Code

Submit a New Comment

Code B1845 2016 Chevrolet Silverado comments

No comments found for this page.