B1840 2014 GMC Sierra Code - Driver Seat Lumbar Up 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
- B1840 2014 GMC Sierra indicates Driver Seat Lumbar Up 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 B1840 2014 GMC Sierra Description
What are the Possible Causes of the DTC B1840 2014 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 B1840 2014 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 B1840 2014 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 B1840 2014 GMC Sierra Code
1. What are the common symptoms of OBDII code B1840 in a 2014 GMC Sierra related to the driver seat lumbar up switch circuit?
- The common symptoms include the driver seat lumbar up switch not functioning properly, the lumbar support not adjusting as intended, or the seat lumbar support being stuck in a certain position.
2. What could be the possible causes of OBDII code B1840 in a 2014 GMC Sierra?
- The code B1840 could be triggered by a faulty driver seat lumbar up switch, a wiring issue in the circuit, a blown fuse, or a problem with the seat control module.
3. How can I diagnose the driver seat lumbar up switch circuit issue in my 2014 GMC Sierra?
- You can start by checking the fuse related to the lumbar support circuit, inspecting the wiring for any visible damage, testing the driver seat lumbar up switch for continuity, and scanning the vehicle with an OBDII scanner for trouble codes.
4. What are some repair tips for resolving OBDII code B1840 in a 2014 GMC Sierra?
- Repair tips include replacing a faulty driver seat lumbar up switch, repairing any damaged wiring in the circuit, ensuring proper fuse functionality, and resetting the trouble code with an OBDII scanner after the issue is fixed.
5. Can I still drive my 2014 GMC Sierra with OBDII code B1840 related to the driver seat lumbar up switch circuit?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent any inconvenience or discomfort caused by the malfunctioning driver seat lumbar support.
6. How much does it typically cost to repair OBDII code B1840 in a 2014 GMC Sierra at a mechanic or dealership?
- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor, including the replacement of the driver seat lumbar up switch or repairing the wiring.
7. Is the driver seat lumbar up switch circuit covered under any warranty for a 2014 GMC Sierra?
- Depending on the warranty status of your vehicle, this specific component may be covered under the manufacturer's warranty or an extended warranty if applicable. It is recommended to check with your dealership or refer to your warranty documentation for more information.
8. Are there any preventive measures to avoid OBDII code B1840 in a 2014 GMC Sierra related to the driver seat lumbar up switch circuit?
- Regularly checking the functionality of the driver seat lumbar support system, avoiding excessive force when adjusting the lumbar support, and promptly addressing any issues with the seat controls can help prevent the occurrence of this trouble code.
9. Can I reset OBDII code B1840 in a 2014 GMC Sierra without repairing the issue with the driver seat lumbar up switch circuit?
- While you can reset the trouble code using an OBDII scanner, it is recommended to diagnose and repair the underlying issue causing the code to prevent it from reoccurring and ensure the proper functionality of the driver seat lumbar support.
10. Is it possible to fix OBDII code B1840 in a 2014 GMC Sierra related to the driver seat lumbar up switch circuit on my own?
- Depending on your automotive repair skills and access to tools, you may be able to fix the issue yourself by following repair guides, replacing the driver seat lumbar up switch, checking the wiring, and resetting the trouble code with an OBDII scanner. If in doubt, it is advisable to seek professional help.
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