AutoCodesChevrolet – B1845 2015 Chevrolet Silverado

B1845 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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.
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Code Popularity 152
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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado - Driver Seat Lumbar Down Switch Circuit - AutoCodes.com
B1845 2015 Chevrolet Silverado Code - Driver Seat Lumbar Down Switch Circuit

What are the Possible Causes of the DTC B1845 2015 Chevrolet Silverado?

  • 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 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado Code

Q: What does the OBDII code B1845 mean on a 2015 Chevrolet Silverado?

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

Q: What are common symptoms of code B1845 in a 2015 Chevrolet Silverado?

A: Symptoms may include the driver seat lumbar adjustment not functioning, intermittent operation, or no response when pressing the down switch.

Q: What causes the B1845 code on a 2015 Chevrolet Silverado?

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

Q: How can I diagnose the B1845 code on my Silverado?

A: Start by inspecting the lumbar down switch, wiring, and connectors for damage or corrosion, and use a scan tool to check for related codes or modules’ functionality.

Q: Can a faulty lumbar down switch trigger the B1845 code?

A: Yes, a malfunctioning or stuck lumbar down switch can cause this code by disrupting the circuit's operation.

Q: Is it safe to drive with the B1845 code on my Silverado?

A: Yes, it’s generally safe to drive, but you may experience inconvenience with the lumbar adjustment not working properly.

Q: How can I fix the B1845 code on a 2015 Chevrolet Silverado?

A: Repairs may include replacing the lumbar down switch, repairing damaged wiring or connectors, or recalibrating the seat control module if necessary.

Q: How much does it cost to fix the B1845 code?

A: Repair costs can vary but typically range from $50 to $200 depending on whether parts like the switch or wiring need replacement.

Q: Can clearing the B1845 code solve the problem permanently?

A: Clearing the code may reset the system temporarily, but the underlying issue must be repaired to prevent the code from returning.

Q: Do I need to reprogram the seat control module after fixing the B1845 code?

A: In some cases, recalibration or reprogramming of the seat control module may be necessary to ensure proper operation after repairs.

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