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B1805 Cadillac Code - Driver Seat Motor Side Bolster Circuit

Quick Answer

The B1805 diagnostic trouble code (DTC) for Cadillac vehicles specifically refers to an issue with the driver seat motor side bolster circuit. Common causes include Damaged wiring or connectors in the driver seat motor side bolster circuit, Faulty driver seat motor or side bolster adjustment mechanism, Corrosion or moisture in the electrical components of the circuit. 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
B1805 Cadillac indicates Driver Seat Motor Side Bolster Circuit.
Common causes
Common causes include Damaged wiring or connectors in the driver seat motor side bolster circuit, Faulty driver seat motor or side bolster adjustment mechanism, Corrosion or moisture in the electrical components of the circuit.
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 17, 2024
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Code B1805 Cadillac Description

The B1805 diagnostic trouble code (DTC) for Cadillac vehicles specifically refers to an issue with the driver seat motor side bolster circuit. This code indicates a problem with the electrical circuit that controls the side bolster adjustment feature of the driver's seat. The side bolster is the part of the seat that provides additional support and comfort by adjusting the width of the seat cushion.

OBDII Code B1805 Cadillac - Driver Seat Motor Side Bolster Circuit
B1805 Cadillac Code - Driver Seat Motor Side Bolster Circuit

Common Causes of B1805 Cadillac

  1. Damaged wiring or connectors in the driver seat motor side bolster circuit.
  2. Faulty driver seat motor or side bolster adjustment mechanism.
  3. Corrosion or moisture in the electrical components of the circuit.
  4. Issues with the control module responsible for managing the driver seat functions.

Symptoms of B1805 Cadillac

  1. Inability to adjust the side bolster of the driver's seat.
  2. Unusual noises coming from the seat when attempting to adjust the side bolster.
  3. Erratic movement of the side bolster when using the adjustment controls.
  4. Warning light on the dashboard indicating a problem with the driver seat adjustment system.

How to Fix B1805 Cadillac

  1. Begin by conducting a thorough visual inspection of the wiring, connectors, and components associated with the driver seat motor side bolster circuit to identify any visible damage or issues.
  2. Use a multimeter to test the continuity of the wiring and connectors to pinpoint any areas of concern where there may be a break or short.
  3. Inspect the driver seat motor and side bolster adjustment mechanism for proper operation and replace any faulty components as needed.
  4. Clear the DTC from the vehicle's onboard diagnostic system using a scan tool after completing the repairs to reset the system and ensure the code does not reappear.
  5. Test the driver seat adjustment system to verify that the side bolster feature is functioning correctly before returning the vehicle to service.

Cost to Fix B1805 Cadillac

The typical repair costs for addressing a B1805 code related to the driver seat motor side bolster circuit can vary depending on the extent of the issue and the specific components that require replacement. In general, you can expect to pay anywhere from $150 to $500 for parts and labor to resolve this problem. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local providers for a more accurate estimate based on your location and vehicle model.

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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 B1805 Cadillac Code

1. What are the common symptoms of OBDII code B1805 in a Cadillac related to the driver seat motor side bolster circuit?

The common symptoms include malfunctioning power seat adjustments, inability to adjust the side bolster support, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code B1805 in a Cadillac?

Potential causes of this code include damaged wiring or connectors in the driver seat motor side bolster circuit, a faulty side bolster motor, or a malfunctioning control module.

3. How can I diagnose the issue related to OBDII code B1805 in my Cadillac?

You can diagnose the problem by conducting a visual inspection of the wiring and connectors, using a multimeter to test for continuity, and scanning the vehicle's computer system for specific error codes.

4. Can I repair OBDII code B1805 in my Cadillac on my own?

Depending on your level of automotive expertise, you may be able to repair this issue yourself by replacing damaged wiring or connectors, testing and replacing the side bolster motor, or reprogramming the control module if necessary.

5. Is it safe to drive my Cadillac with OBDII code B1805 present?

If the driver seat functions are still working properly and there are no other noticeable issues, it may be safe to drive the vehicle. However, it is recommended to address the problem promptly to avoid potential safety risks.

6. How much does it typically cost to repair OBDII code B1805 in a Cadillac?

The cost of repairing this code can vary depending on the specific cause of the issue, the parts required for the repair, and whether you choose to do the repairs yourself or take your vehicle to a professional mechanic.

7. Can resetting the OBDII system clear the B1805 code in my Cadillac?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the B1805 code is not addressed, the code is likely to reappear after driving the vehicle for a certain distance or time.

8. Are there any preventative measures I can take to avoid OBDII code B1805 in my Cadillac?

To prevent OBDII code B1805, you can regularly inspect the wiring and connectors in the driver seat motor side bolster circuit, avoid putting excessive pressure on the side bolster, and follow proper maintenance guidelines for your vehicle.

9. Can extreme temperatures or environmental conditions trigger OBDII code B1805 in a Cadillac?

Yes, extreme temperatures or environmental conditions can potentially lead to wiring degradation or electrical component malfunctions, which may trigger OBDII code B1805 in your Cadillac.

10. How long does it typically take to repair OBDII code B1805 in a Cadillac?

The repair time for OBDII code B1805 can vary depending on the complexity of the issue and the availability of parts. In some cases, it may take a few hours to a full day to diagnose and repair the problem effectively.

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