Engine-Codes.com
Engine-Codes – Cadillac – B1790 Cadillac

B1790 Cadillac Code - Driver Seat Motor Lumbar Circuit

Quick Answer

The B1790 Cadillac code specifically relates to an issue with the driver seat motor lumbar circuit in the vehicle. Common causes include Faulty lumbar support motor, Wiring issues or shorts in the driver seat motor lumbar circuit, Malfunctioning lumbar support switch or control module. 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 Cadillac indicates Driver Seat Motor Lumbar Circuit.
Common causes
Common causes include Faulty lumbar support motor, Wiring issues or shorts in the driver seat motor lumbar circuit, Malfunctioning lumbar support switch or control module.
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 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B1790 Cadillac Description

The B1790 Cadillac code specifically relates to an issue with the driver seat motor lumbar circuit in the vehicle. This code indicates that there is a malfunction or fault in the electrical circuit that controls the lumbar support feature of the driver's seat. The lumbar support feature is designed to provide additional support and comfort to the driver's lower back by adjusting the curvature of the seat back.

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

Common Causes of B1790 Cadillac

  1. Faulty lumbar support motor.
  2. Wiring issues or shorts in the driver seat motor lumbar circuit.
  3. Malfunctioning lumbar support switch or control module.
  4. Loose or damaged connections in the circuit.
  5. Corrosion or water damage in the electrical components related to the driver seat motor lumbar circuit.

Symptoms of B1790 Cadillac

  1. Inability to adjust the lumbar support in the driver's seat.
  2. Lumbar support adjusting on its own without input from the driver.
  3. Unusual noises coming from the driver's seat area when attempting to adjust the lumbar support.
  4. Lack of support or discomfort in the lower back while driving.
  5. Error code B1790 displayed on the vehicle's diagnostic system.

How to Fix B1790 Cadillac

  1. Begin by diagnosing the specific cause of the issue by inspecting the lumbar support motor, wiring, switch, and control module.
  2. Test the lumbar support motor to determine if it is functioning correctly or needs to be replaced.
  3. Check the wiring and connections in the driver seat motor lumbar circuit for any signs of damage or corrosion, repairing or replacing as needed.
  4. Inspect the lumbar support switch and control module for any faults or malfunctions, replacing them if necessary.
  5. Clear the B1790 code from the vehicle's system and test the lumbar support feature to ensure it is working properly after the repairs have been completed.

Cost to Fix B1790 Cadillac

The cost of repairing the driver seat motor lumbar circuit can vary depending on the specific cause of the issue and the extent of the repair work needed. On average, the parts for this repair can range from $100 to $300, while the labor costs can range from $150 to $400. Overall, the total repair cost for addressing the B1790 code in a Cadillac can typically range from $250 to $700. However, it's important to note that these estimates are general and can vary based on factors such as location, vehicle make and model, and the labor rates of the auto repair shop. It is recommended to obtain a specific quote from a qualified mechanic to get a more accurate cost estimate for this repair.

Need more information about the B1790 Cadillac code?

Need more information on how to fix the B1790 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1790 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 Cadillac Code

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

The common symptoms include loss of power lumbar support adjustment in the driver's seat and potential issues with the lumbar motor functionality.

2. What are the possible causes of OBDII code B1790 in a Cadillac indicating an issue with the Driver Seat Motor Lumbar Circuit?

Common causes may include a faulty lumbar motor, damaged wiring or connectors in the lumbar circuit, or a malfunctioning lumbar control switch.

3. How can I diagnose the OBDII code B1790 in my Cadillac for the Driver Seat Motor Lumbar Circuit issue?

Diagnosis involves inspecting the lumbar motor, checking the wiring and connectors for any damage, and testing the lumbar control switch for proper functionality using a multimeter.

4. What are some repair tips for resolving OBDII code B1790 in a Cadillac related to the Driver Seat Motor Lumbar Circuit?

Repair tips may include replacing the faulty lumbar motor, repairing or replacing damaged wiring or connectors, and ensuring proper connection and functionality of the lumbar control switch.

5. Can OBDII code B1790 in a Cadillac indicating a problem with the Driver Seat Motor Lumbar Circuit be fixed without professional help?

While some DIY enthusiasts may attempt to diagnose and repair this issue, it is recommended to seek professional help to ensure proper diagnosis and repair of the lumbar circuit problem.

6. Is it safe to continue driving my Cadillac with OBDII code B1790 related to the Driver Seat Motor Lumbar Circuit?

It is generally safe to drive the vehicle with this issue, but it may result in discomfort due to the loss of lumbar support adjustment in the driver's seat. It is advisable to address the problem promptly.

7. Can resetting the OBDII system clear the B1790 code in a Cadillac with a Driver Seat Motor Lumbar Circuit problem?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear upon further operation of the vehicle.

8. How much does it typically cost to repair OBDII code B1790 in a Cadillac associated with the Driver Seat Motor Lumbar Circuit?

The cost of repair can vary depending on the specific cause of the issue, but it may involve parts and labor expenses ranging from a few hundred to over a thousand dollars, especially if professional help is required.

9. Are there any preventive measures I can take to avoid encountering OBDII code B1790 in my Cadillac related to the Driver Seat Motor Lumbar Circuit?

Regular inspection and maintenance of the lumbar circuit components, such as the motor, wiring, and control switch, can help prevent issues that may trigger the B1790 trouble code.

10. Does the OBDII code B1790 in a Cadillac indicating a problem with the Driver Seat Motor Lumbar Circuit affect the overall performance or safety of the vehicle?

While the issue primarily relates to the driver's seat lumbar support functionality, it does not significantly impact the overall performance or safety of the vehicle. However, addressing the problem can enhance the driver's comfort and convenience.

Discuss the causes and fixes for B1790 Cadillac OBDII Code

Submit a New Comment

Code B1790 Cadillac comments

No comments found for this page.