AutoCodesGMC – B1845 2014 GMC Sierra

B1845 2014 GMC Sierra Code - Driver Seat Lumbar Down Switch Circuit

Quick Answer

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster Switch circuit poor electrical connection. 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 GMC Sierra indicates Driver Seat Lumbar Down Switch Circuit.
Common causes
Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster Switch circuit poor electrical connection.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 139
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 24, 2023
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Code B1845 2014 GMC Sierra Description

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. When the power seat or lumbar switches are pressed, the appropriate signal circuit from the Seat Memory Control Module is pulled low through the switch contacts indicating the power seat command. The Seat Memory Control Module then commands the driver seat or lumbar to move in response to the switch signals. The Diagnostic Trouble Code (DTC) will be set when there is a short to ground on a switch signal circuit.
OBDII Code B1845 2014 GMC Sierra - Driver Seat Lumbar Down Switch Circuit - AutoCodes.com
B1845 2014 GMC Sierra Code - Driver Seat Lumbar Down Switch Circuit

What are the Possible Causes of the DTC B1845 2014 GMC Sierra?

  • Faulty Driver Seat Adjuster Switch
  • Driver Seat Adjuster Switch harness is open or shorted
  • Driver Seat Adjuster Switch circuit poor electrical connection
  • Faulty Seat Memory Control Module

How to Fix the DTC B1845 2014 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1845 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1845 2014 GMC Sierra code?

Need more information on how to fix the B1845 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 GMC Sierra Code

1. What are the common symptoms of OBDII code B1845 in a 2014 GMC Sierra related to the Driver Seat Lumbar Down Switch Circuit?

The common symptoms include the driver seat lumbar down switch not functioning, the seat lumbar support not adjusting properly, or the seat lumbar making unusual noises.

2. What are the possible causes of OBDII code B1845 in a 2014 GMC Sierra?

Possible causes include a faulty driver seat lumbar down switch, damaged wiring or connectors in the circuit, or a malfunctioning seat control module.

3. How can I diagnose the issue causing OBDII code B1845 in my 2014 GMC Sierra?

You can diagnose the issue by checking the wiring and connectors related to the driver seat lumbar down switch, testing the switch for continuity, and using a scan tool to identify any specific faults in the circuit.

4. Can I still drive my 2014 GMC Sierra with OBDII code B1845 present?

While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to avoid any potential safety concerns or further damage to the seat lumbar system.

5. How can I repair OBDII code B1845 in my 2014 GMC Sierra related to the Driver Seat Lumbar Down Switch Circuit?

Repair options include replacing the driver seat lumbar down switch, repairing any damaged wiring or connectors in the circuit, or resetting the seat control module.

6. Are there any DIY tips for troubleshooting OBDII code B1845 in a 2014 GMC Sierra?

You can start by visually inspecting the wiring and connectors for any obvious damage, checking the fuse related to the seat lumbar system, and testing the switch for proper functionality.

7. Is it safe to attempt repairing OBDII code B1845 in my 2014 GMC Sierra without prior experience?

If you are comfortable working with automotive electrical systems and have the necessary tools, you may attempt the repair. Otherwise, it is advisable to seek assistance from a professional mechanic.

8. Can weather or environmental factors contribute to triggering OBDII code B1845 in a 2014 GMC Sierra?

Extreme temperatures, moisture, or exposure to water can potentially damage the wiring or connectors in the driver seat lumbar down switch circuit, leading to the triggering of this fault code.

9. How long does it typically take to repair OBDII code B1845 in a 2014 GMC Sierra?

The repair time can vary depending on the exact cause of the issue and the expertise of the person performing the repair. It can range from a quick fix to a more involved troubleshooting process.

10. Will resetting the OBDII system clear the B1845 fault code in my 2014 GMC Sierra?

Resetting the OBDII system may temporarily clear the fault code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is best to diagnose and repair the root cause of the problem.

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