B1840 2015 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 2015 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 2015 GMC Sierra Description
What are the Possible Causes of the DTC B1840 2015 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 2015 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 2015 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.
Need more information about the B1840 2015 GMC Sierra code?
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Frequently Asked Questions about B1840 2015 GMC Sierra Code
1. What are the common symptoms of OBDII code B1840 in a 2015 GMC Sierra related to the driver seat lumbar up switch circuit?
The common symptoms include the driver seat lumbar up switch not functioning, inability to adjust the lumbar support, or the switch not responding.
2. What are the possible causes of OBDII code B1840 in a 2015 GMC Sierra?
Potential causes of this code may include a faulty driver seat lumbar up switch, damaged wiring or connectors in the circuit, or a malfunctioning control module.
3. How can I diagnose the issue related to OBDII code B1840 in my 2015 GMC Sierra?
You can start by inspecting the driver seat lumbar up switch for any visible damage, checking the wiring and connectors for loose connections or corrosion, and using a multimeter to test the circuit continuity.
4. Is it safe to continue driving my 2015 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 ensure proper functioning of the driver seat lumbar support.
5. How can I repair OBDII code B1840 in my 2015 GMC Sierra myself?
You can attempt to repair this code by replacing the faulty driver seat lumbar up switch, repairing any damaged wiring or connectors, or resetting the control module after fixing the issue.
6. Can resetting the control module help clear OBDII code B1840 in my 2015 GMC Sierra?
Resetting the control module may help clear the code temporarily, but it is important to address the root cause of the issue to prevent the code from reoccurring.
7. Are there any common mistakes to avoid when troubleshooting OBDII code B1840 in a 2015 GMC Sierra?
Avoid overlooking simple issues like loose connections or blown fuses, as these can often be the cause of the problem related to the driver seat lumbar up switch circuit.
8. Should I seek professional help to diagnose and repair OBDII code B1840 in my 2015 GMC Sierra?
If you are unsure about diagnosing or repairing the issue yourself, it is recommended to seek the assistance of a qualified mechanic or dealership to properly address the problem.
9. How much can I expect to pay for repairing OBDII code B1840 in my 2015 GMC Sierra at a professional service center?
The cost of repairing this code can vary depending on the exact cause of the issue, but you can expect to pay for parts, labor, and diagnostic fees at a professional service center.
10. Is the driver seat lumbar up switch circuit covered under any warranty for a 2015 GMC Sierra?
Depending on the warranty coverage of your vehicle, the driver seat lumbar up switch circuit may be covered under a powertrain or extended warranty, so it is advisable to check with your dealership for more information.
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