B1845 2016 GMC Sierra 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 GMC Sierra 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.
Code B1845 2016 GMC Sierra Description
What are the Possible Causes of the DTC B1845 2016 GMC Sierra?
- 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 GMC Sierra?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1845 2016 GMC Sierra 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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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.
Discuss the causes and fixes for B1845 2016 GMC Sierra OBDII Code
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