B1840 2016 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 2016 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 2016 GMC Sierra Description
What are the Possible Causes of the DTC B1840 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 B1840 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 B1840 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 B1840 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code B1840 in a 2016 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 seat lumbar support being stuck in one position, or the seat lumbar support moving uncontrollably.
2. What are the possible causes of OBDII code B1840 in a 2016 GMC Sierra?
- The possible causes could be a malfunctioning driver seat lumbar up switch, damaged wiring or connectors in the circuit, or a faulty seat control module.
3. How can I diagnose the issue related to OBDII code B1840 in my 2016 GMC Sierra?
- You can start by checking the wiring and connectors for any visible damage, testing the driver seat lumbar up switch for proper functionality, and using a diagnostic scanner to read and clear the trouble code.
4. Is it safe to continue driving my 2016 GMC Sierra with OBDII code B1840 related to the driver seat lumbar up switch circuit?
- It is not recommended to drive the vehicle with this issue as it may affect the driver's comfort and seating position, potentially leading to discomfort or distraction while driving.
5. How can I repair OBDII code B1840 in my 2016 GMC Sierra related to the driver seat lumbar up switch circuit?
- The repair process may involve replacing the driver seat lumbar up switch, repairing or replacing damaged wiring and connectors, or reprogramming the seat control module if necessary.
6. Can I fix OBDII code B1840 in my 2016 GMC Sierra related to the driver seat lumbar up switch circuit myself?
- Depending on your automotive repair skills and knowledge, you may be able to troubleshoot and fix the issue yourself by following the vehicle's service manual or seeking assistance from a professional mechanic.
7. Are there any temporary solutions to address OBDII code B1840 in my 2016 GMC Sierra related to the driver seat lumbar up switch circuit?
- One temporary solution could be manually adjusting the seat lumbar support to a comfortable position and avoiding using the malfunctioning switch until the issue is properly diagnosed and repaired.
8. How much does it typically cost to repair OBDII code B1840 in a 2016 GMC Sierra related to the driver seat lumbar up switch circuit?
- The cost of repair can vary depending on the specific cause of the issue, the cost of replacement parts, and the labor rates of the repair shop. It is recommended to obtain quotes from different professionals for an accurate estimate.
9. Are there any recalls or technical service bulletins related to OBDII code B1840 in a 2016 GMC Sierra?
- It is advisable to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to this specific OBDII code in your vehicle.
10. How can I prevent OBDII code B1840 from occurring again in my 2016 GMC Sierra after repair?
- To prevent the recurrence of this issue, it is essential to ensure proper installation of replacement parts, regularly inspect the seat lumbar switch circuit for any signs of damage, and follow the manufacturer's maintenance recommendations for your vehicle.
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