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Engine-Codes – Generic – B320B

B320B Code - Rear Door Window Motor

Quick Answer

The diagnostic code B320B refers to an issue with the rear door window motor in a vehicle. Common causes include Worn-out motor brushes, Damaged wiring or electrical connections, Faulty window switch. 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
B320B indicates Rear Door Window Motor.
Common causes
Common causes include Worn-out motor brushes, Damaged wiring or electrical connections, Faulty window switch.
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 20, 2024
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Code B320B Description

The diagnostic code B320B refers to an issue with the rear door window motor in a vehicle. This code indicates that there is a malfunction or failure in the motor responsible for operating the rear door window. The window motor is an essential component that allows the window to move up and down when the switch is activated. When this motor fails, it can lead to various issues with the window operation, affecting the overall functionality of the vehicle.

OBDII Code B320B - Rear Door Window Motor
B320B Code - Rear Door Window Motor

Common Causes of B320B

  1. Worn-out motor brushes.
  2. Damaged wiring or electrical connections.
  3. Faulty window switch.
  4. Issues with the window regulator.
  5. Water damage or corrosion affecting the motor.

Symptoms of B320B

  1. Rear door window does not respond to the switch command.
  2. Unusual noises coming from the rear door when attempting to operate the window.
  3. Window moves slowly or inconsistently when activated.
  4. Window gets stuck in a partially open or closed position.
  5. Window drops or rises unevenly when operated.

How to Fix B320B

  1. Diagnose the issue by testing the electrical connections, switches, and motor functionality.
  2. Remove the door panel to access the rear door window motor.
  3. Replace the faulty window motor with a new one.
  4. Test the window operation to ensure proper functionality.
  5. Reassemble the door panel and test the window again to confirm the repair.

Cost to Fix B320B

The typical repair costs for a rear door window motor replacement can range from $150 to $400, including parts and labor. However, 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 in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

What does this mean?

Tech Notes for B320B

B320B 39 Rear Door Window Motor Internal Electronic Failure/Discard

B320B 42 Rear Door Window Motor Calibration Data Set Not Programmed

B320B 4B Rear Door Window Motor Calibration Not Learned

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Code B320B Information for Specific Makes

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 B320B Code

1. What are the common symptoms of OBDII code B320B related to the rear door window motor?

- The common symptoms include the rear door window not operating properly, slow or erratic movement, or complete failure to move.

2. What are some possible causes of OBDII code B320B indicating an issue with the rear door window motor?

- The code may be triggered by a faulty rear door window motor, damaged wiring, a blown fuse, or a malfunctioning window regulator.

3. How can I diagnose the OBDII code B320B for the rear door window motor issue?

- To diagnose the issue, you can start by checking the rear door window motor connections, testing the power supply, inspecting the wiring harness, and examining the condition of the window regulator.

4. What are some repair tips for addressing OBDII code B320B concerning the rear door window motor?

- Repair tips include checking and replacing any damaged wiring, testing the rear door window motor for functionality, ensuring proper power supply, and lubricating the window regulator mechanism.

5. Can I reset OBDII code B320B related to the rear door window motor after making repairs?

- Yes, after addressing the underlying issue causing the code, you can reset it using an OBDII scanner or by disconnecting the car battery for a few minutes.

6. Is it safe to continue driving with OBDII code B320B indicating a rear door window motor problem?

- It is not recommended to drive with this code unresolved, as it may lead to further damage or safety hazards due to the rear door window not functioning correctly.

7. How much does it typically cost to repair OBDII code B320B associated with the rear door window motor?

- The repair cost can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor, excluding diagnostic fees.

8. Are there any preventive maintenance measures to avoid encountering OBDII code B320B for the rear door window motor?

- Regularly inspecting and lubricating the rear door window mechanism, checking the wiring for any signs of wear, and addressing any window operation issues promptly can help prevent this code from appearing.

9. Can extreme weather conditions affect the rear door window motor and trigger OBDII code B320B?

- Yes, extreme heat or cold can impact the performance of the rear door window motor, leading to issues that may trigger the OBDII code B320B.

10. How long does it typically take to repair OBDII code B320B related to the rear door window motor?

- The repair time can vary based on the exact cause of the issue and the complexity of the repair, but it may take anywhere from 1 to 3 hours to address the problem effectively.

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