B1845 Chevrolet Code - Driver Seat Lumbar Down Switch Circuit
Quick Answer
The B1845 Chevrolet code indicates a problem with the driver seat lumbar down switch circuit. Common causes include Damaged wiring or connectors in the lumbar support circuit, Faulty driver seat lumbar down switch, Malfunctioning control module that regulates the lumbar support adjustment. 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 Chevrolet indicates Driver Seat Lumbar Down Switch Circuit.
- Common causes
- Common causes include Damaged wiring or connectors in the lumbar support circuit, Faulty driver seat lumbar down switch, Malfunctioning control module that regulates the lumbar support adjustment.
- 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 B1845 Chevrolet Description
The B1845 Chevrolet code indicates a problem with the driver seat lumbar down switch circuit. This means that there is a malfunction in the electrical circuit that controls the lumbar support adjustment in the driver's seat. The lumbar support feature is designed to provide additional lower back support and comfort for the driver. When this circuit is not functioning properly, it can lead to issues with adjusting the lumbar support, potentially causing discomfort and affecting the driver's posture while driving.
Common Causes of B1845 Chevrolet
- Damaged wiring or connectors in the lumbar support circuit.
- Faulty driver seat lumbar down switch.
- Malfunctioning control module that regulates the lumbar support adjustment.
- Poor electrical connections between components.
- General wear and tear on the lumbar support system over time.
Symptoms of B1845 Chevrolet
- Inability to adjust the lumbar support in the driver's seat.
- Lumbar support adjustment working intermittently.
- Strange noises or clicking sounds when trying to adjust the lumbar support.
- Lumbar support moving in the wrong direction or getting stuck in one position.
- Illumination of the airbag warning light on the dashboard (as the lumbar support circuit may be interconnected with the airbag system).
How to Fix B1845 Chevrolet
- Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the B1845 code and pinpoint the faulty component.
- Inspect the wiring and connectors in the lumbar support circuit for any signs of damage or corrosion. Repair or replace any damaged components.
- Test the driver seat lumbar down switch to determine if it is functioning correctly. Replace the switch if necessary.
- Check the control module for proper operation and replace it if it is found to be faulty.
- Clear the diagnostic trouble codes from the vehicle's memory and test the lumbar support system to ensure that the issue has been resolved.
Cost to Fix B1845 Chevrolet
The typical repair costs for addressing the B1845 Chevrolet code can vary depending on the specific cause of the issue and the cost of parts and labor. In general, repairing the driver seat lumbar down switch circuit may range from $150 to $400, including parts and labor. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local auto repair shops for a more accurate estimate based on your specific circumstances.
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Information for Specific Chevrolet Models
- B1845 2014 Chevrolet Silverado — Driver Seat Lumbar Down Switch Circuit
- B1845 2015 Chevrolet Silverado — Driver Seat Lumbar Down Switch Circuit
- B1845 2016 Chevrolet Silverado — Driver Seat Lumbar Down Switch Circuit
- B1845 2017 Chevrolet Silverado — Driver Seat Lumbar Down Switch Circuit
- B1845 2018 Chevrolet Silverado — Driver Seat Lumbar Down Switch Circuit
Frequently Asked Questions about B1845 Chevrolet Code
1. What does the OBDII code B1845 mean on a Chevrolet?
The B1845 code indicates a problem with the driver seat lumbar down switch circuit, which controls the lumbar support adjustment in the seat.
2. What are common symptoms of the B1845 code?
Symptoms include the lumbar support not moving down when the switch is pressed, complete failure of lumbar adjustment, or intermittent operation.
3. What causes the B1845 code to appear?
The code is typically triggered by a faulty lumbar down switch, damaged wiring or connectors in the circuit, or a malfunctioning seat control module.
4. Can a blown fuse cause the B1845 code?
Yes, a blown fuse in the seat adjustment circuit can lead to the code being stored, as it disrupts power to the lumbar switch.
5. How do I diagnose the B1845 code?
Start by inspecting the lumbar switch, wiring, and connectors for damage or corrosion. Use a multimeter to check for continuity and proper voltage in the circuit.
6. Can I still adjust the lumbar support with the B1845 code?
If the issue is isolated to the "down" function of the lumbar switch, other adjustments may still work, but full functionality may be impaired.
7. How do I fix the B1845 code?
Repairs may include replacing the lumbar down switch, repairing or replacing damaged wiring, or reprogramming or replacing the seat control module if necessary.
8. Is the B1845 code a serious issue?
While it doesn’t affect vehicle safety or drivability, it can be inconvenient and should be addressed to restore full seat adjustment functionality.
9. How much does it cost to repair the B1845 code?
The cost depends on the root cause, but replacing the lumbar switch typically costs $50–$150, while more extensive wiring or module repairs can be higher.
10. Can I clear the B1845 code without fixing the problem?
Clearing the code without addressing the issue may temporarily remove it, but it’s likely to return if the underlying problem isn’t resolved.
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