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B1790 Chevrolet Code - Driver Seat Motor Lumbar Circuit

Quick Answer

The B1790 diagnostic trouble code (DTC) for Chevrolet vehicles specifically relates to the driver seat motor lumbar circuit. Common causes include Damaged wiring or connectors in the driver seat lumbar circuit, Faulty seat control module, Loose connections in the lumbar support system. 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
B1790 Chevrolet indicates Driver Seat Motor Lumbar Circuit.
Common causes
Common causes include Damaged wiring or connectors in the driver seat lumbar circuit, Faulty seat control module, Loose connections in the lumbar support system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code B1790 Chevrolet Description

The B1790 diagnostic trouble code (DTC) for Chevrolet vehicles specifically relates to the driver seat motor lumbar circuit. This code indicates that there is a malfunction in the electrical circuit responsible for controlling the lumbar support feature in the driver's seat. The lumbar support feature allows the driver to adjust the lower back support in the seat for added comfort and proper posture while driving.

OBDII Code B1790 Chevrolet - Driver Seat Motor Lumbar Circuit
B1790 Chevrolet Code - Driver Seat Motor Lumbar Circuit

Common Causes of B1790 Chevrolet

  1. Damaged wiring or connectors in the driver seat lumbar circuit.
  2. Faulty seat control module.
  3. Loose connections in the lumbar support system.
  4. Malfunctioning lumbar support motor.
  5. Issues with the lumbar support switch or controls.

Symptoms of B1790 Chevrolet

  1. Inability to adjust the lumbar support in the driver's seat.
  2. Lumbar support adjustment controls not responding.
  3. Uncomfortable driving position due to lack of lumbar support.
  4. Warning light on the dashboard related to the driver seat lumbar support.

How to Fix B1790 Chevrolet

  1. Begin by conducting a thorough visual inspection of the wiring and connectors in the driver seat lumbar circuit to identify any visible damage or loose connections.
  2. Use a multimeter to test the continuity of the wiring and connectors to pinpoint any electrical issues that may be causing the malfunction.
  3. Inspect the seat control module for any signs of damage or malfunction and replace if necessary.
  4. Test the lumbar support motor to ensure it is functioning correctly and replace it if it is found to be faulty.
  5. Finally, reset the fault codes and test the lumbar support feature to verify that the issue has been resolved.

Cost to Fix B1790 Chevrolet

The typical repair costs for addressing the B1790 Chevrolet code related to the driver seat motor lumbar circuit can range from $200 to $500, including parts and labor. However, it is important to note that the specific 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 is advisable to check local rates for a more precise estimate. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops often charge less for repairs.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1790 Chevrolet Code

1. What are the common symptoms of OBDII code B1790 in a Chevrolet related to the Driver Seat Motor Lumbar Circuit?

- Common symptoms may include the inability to adjust the lumbar support in the driver seat or the lumbar support moving on its own.

2. What are some possible causes of OBDII code B1790 in a Chevrolet?

- Possible causes may include a faulty lumbar support motor, damaged wiring or connectors in the lumbar circuit, or a malfunctioning lumbar switch.

3. How can I diagnose the issue related to OBDII code B1790 in my Chevrolet's Driver Seat Motor Lumbar Circuit?

- You can start by visually inspecting the lumbar support motor, checking the wiring and connectors for any damage, and testing the lumbar switch for proper functionality.

4. Can I repair the Driver Seat Motor Lumbar Circuit issue myself?

- Depending on your mechanical skills, you may be able to repair the issue yourself by replacing the faulty lumbar support motor, repairing damaged wiring, or replacing the lumbar switch.

5. Is it safe to drive my Chevrolet with OBDII code B1790 related to the Driver Seat Motor Lumbar Circuit?

- It is generally safe to drive your vehicle with this code, but you may experience discomfort from the lack of lumbar support adjustment.

6. Will resetting the OBDII code B1790 in my Chevrolet fix the issue permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

7. How much does it typically cost to repair OBDII code B1790 in a Chevrolet?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for parts and labor.

8. Can OBDII code B1790 in a Chevrolet affect other systems in the vehicle?

- This code is specific to the Driver Seat Motor Lumbar Circuit and is unlikely to directly impact other systems in the vehicle.

9. What are some preventive maintenance tips to avoid OBDII code B1790 in a Chevrolet?

- Regularly inspecting the lumbar support system, avoiding putting excessive pressure on the lumbar support, and addressing any issues promptly can help prevent this code from appearing.

10. Is there a recall or service bulletin related to OBDII code B1790 in Chevrolet vehicles?

- It is recommended to check with a Chevrolet dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any related recalls or service bulletins regarding this code.

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