AutoCodes – Chevrolet – B1845 2017 Chevrolet Silverado

B1845 2017 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 2017 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 389

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Apr 24, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1845 2017 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 2017 Chevrolet Silverado - Driver Seat Lumbar Down Switch Circuit - AutoCodes.com — B1845 2017 Chevrolet Silverado Code - Driver Seat Lumbar Down Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1845 2017 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 2017 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.

What does this mean?

Code Tech Notes

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1845 2017 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.

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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 2017 Chevrolet Silverado Code

1. What does OBDII code B1845 mean on a 2017 Chevrolet Silverado?

Code B1845 indicates an issue in the driver seat lumbar down switch circuit, which can prevent proper operation of the lumbar support adjustment.

2. What are common symptoms of the B1845 code?

Symptoms include the driver seat lumbar support not moving downward, limited lumbar adjustability, or no response when pressing the lumbar down switch.

3. What causes the B1845 code to appear?

Common causes include a faulty lumbar down switch, damaged wiring or connectors in the circuit, or a malfunctioning lumbar motor.

4. How can I diagnose the B1845 code?

Start by checking the lumbar down switch for proper function, inspect the wiring and connectors for damage or corrosion, and test the lumbar motor circuit for continuity.

5. Can I still drive with the B1845 code active?

Yes, the code does not affect the vehicle's drivability, but the lumbar support adjustment may not work, impacting comfort during driving.

6. How do I fix the B1845 code?

Repairs may involve replacing the lumbar down switch, repairing damaged wiring or connectors, or replacing the lumbar motor if itâ€™s faulty.

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

The cost depends on the specific repair needed but typically ranges from $100 to $300, including parts and labor.

8. Can a blown fuse cause the B1845 code?

A blown fuse is unlikely to specifically cause the B1845 code, but itâ€™s still worth checking the seat control circuit fuse as part of the diagnosis.

9. Will clearing the B1845 code fix the issue?

Clearing the code without addressing the underlying issue will only temporarily remove it. The code will reappear if the problem persists.

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

While basic inspections like checking connections can be done at home, diagnosing and repairing electrical issues often require professional tools and expertise.