B1845 2016 GMC Sierra Code - Driver Seat Lumbar Down Switch Circuit
Quick Answer
The B1845 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically relates to the driver seat lumbar down switch circuit. Common causes include Damaged wiring in the lumbar support circuit, Faulty driver seat lumbar down switch, Malfunctioning control module. 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 GMC Sierra indicates Driver Seat Lumbar Down Switch Circuit.
- Common causes
- Common causes include Damaged wiring in the lumbar support circuit, Faulty driver seat lumbar down switch, Malfunctioning control module.
- 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 2016 GMC Sierra Description
The B1845 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically relates to the driver seat lumbar down switch circuit. This code indicates that there is a malfunction in the circuit responsible for controlling 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, enhancing the overall driving experience.
Common Causes of B1845 2016 GMC Sierra
- Damaged wiring in the lumbar support circuit.
- Faulty driver seat lumbar down switch.
- Malfunctioning control module.
- Poor electrical connection.
- Wear and tear on components over time.
Symptoms of B1845 2016 GMC Sierra
- Inability to adjust the lumbar support in the driver's seat.
- Lumbar support stuck in one position.
- Lumbar support not functioning at all.
- Discomfort or back pain during driving.
- Fatigue from lack of proper lumbar support.
How to Fix B1845 2016 GMC Sierra
- Begin by conducting a thorough inspection of the wiring, connectors, and components in the driver seat lumbar down switch circuit.
- Test the driver seat lumbar down switch and control module for proper functionality.
- Repair or replace any damaged wiring or connectors in the circuit.
- Replace the driver seat lumbar down switch if it is found to be faulty.
- Reset the system and test the lumbar support feature to ensure it is functioning correctly.
Cost to Fix B1845 2016 GMC Sierra
The typical repair costs for addressing the B1845 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair could range from $50 to $200, while labor costs could range from $100 to $300. 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 repair shops for a more accurate estimate.
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Frequently Asked Questions about B1845 2016 GMC Sierra Code
1. What does OBDII code B1845 mean on a 2016 GMC Sierra?
Code B1845 indicates an issue with the driver seat lumbar down switch circuit, typically involving an open, short, or malfunction in the wiring or switch.
2. What are the common symptoms of code B1845?
Symptoms may include the lumbar support not moving down when the switch is pressed, inoperative lumbar adjustment, or an illuminated warning light on the dashboard.
3. What causes the B1845 code on a 2016 GMC Sierra?
Common causes include a faulty lumbar down switch, damaged wiring or connectors, or an issue with the seat control module.
4. How can I diagnose the B1845 code?
Start by inspecting the lumbar switch and its wiring for visible damage. Use a multimeter to test for continuity and proper voltage in the circuit, and scan for related codes.
5. Can I drive my GMC Sierra with a B1845 code?
Yes, the vehicle is drivable, but the lumbar adjustment feature may not work properly, which can affect seating comfort.
6. How do I fix the B1845 code on my 2016 GMC Sierra?
Repairs might involve replacing the faulty lumbar down switch, repairing damaged wiring or connectors, or reprogramming or replacing the seat control module.
7. How much does it cost to fix the B1845 code?
Repair costs vary depending on the issue, but replacing the lumbar switch typically ranges from $50 to $150, plus labor if done by a professional.
8. Can a blown fuse cause the B1845 code?
It’s unlikely, but you should check the associated seat adjustment fuse to rule out a simple fix.
9. Do I need to reset the code after fixing the problem?
Yes, after repairs, use an OBDII scanner to clear the code and verify that it doesn’t return.
10. Can a malfunctioning seat control module trigger the B1845 code?
Yes, if the seat control module fails or has a software issue, it can disrupt the lumbar down switch circuit and trigger this code.
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