AutoCodes – Chevrolet – B1845 2016 Chevrolet Silverado

B1845 2016 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 2016 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 146

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 2016 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 2016 Chevrolet Silverado - Driver Seat Lumbar Down Switch Circuit - AutoCodes.com — B1845 2016 Chevrolet Silverado Code - Driver Seat Lumbar Down Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1845 2016 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 2016 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 2016 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 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 driverâ€™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 $50â€“$150 for parts and labor, while seat module repairs may cost $200â€“$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 youâ€™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.