AutoCodes – Generic – B320C

B320C Code - Middle Door Window Motor

Quick Answer

The front door, rear door and middle door power window motors communicate with the Drivers Door Module (DDM), Passenger Door Module (PDM) and Rear Door Modules and Middle Door Modules over the LIN BUS. Common causes include Faulty Middle Door Window Motor, Middle Door Window Motor harness is open or shorted, Middle Door Window Motor 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: B320C indicates Middle Door Window Motor.
Common causes: Common causes include Faulty Middle Door Window Motor, Middle Door Window Motor harness is open or shorted, Middle Door Window Motor 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 432

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 05, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B320C Description

The front door, rear door and middle door power window motors communicate with the Drivers Door Module (DDM), Passenger Door Module (PDM) and Rear Door Modules and Middle Door Modules over the LIN BUS. The motors contain a logic module which must be normalized or programmed any time the window motor is serviced to provide proper operation and communication between door modules and window motors. The Diagnostic Trouble Code (DTC) sets when an internal malfunction has been detected by the DDM or PDM in the Front Door, Rear Door, or Middle Door window motor while commanding the window motor UP/DOWN.

OBDII Code B320C - Middle Door Window Motor - AutoCodes.com — B320C Code - Middle Door Window Motor

What does this mean?

What are the Possible Causes of the DTC B320C?

Faulty Middle Door Window Motor
Middle Door Window Motor harness is open or shorted
Middle Door Window Motor circuit poor electrical connection
Faulty Middle Door Module

How to Fix the DTC B320C?

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 does this mean?

Code Tech Notes

B320C 39 Middle Door Window Motor Internal Electronic Failure/Discard
B320C 42 Middle Door Window Motor Calibration Data Set Not Programmed
B320C 4B Middle Door Window Motor Calibration Not Learned

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B320C 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.

Need more information about the B320C code?

Need more information on how to fix the B320C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B320C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B320C Buick — Middle Door Window Motor
B320C Cadillac — Middle Door Window Motor
B320C Chevrolet — Middle Door Window Motor
B320C GMC — Middle Door Window Motor

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 B320C Code

1. What are the common symptoms of OBDII code B320C (Middle Door Window Motor)?

- The common symptoms of OBDII code B320C include the middle door window motor failing to operate, causing the window to become stuck in a certain position.

2. What are the possible causes of OBDII code B320C?

- The possible causes of OBDII code B320C include a faulty middle door window motor, wiring issues, or a communication error within the vehicle's electrical system.

3. How can I diagnose OBDII code B320C?

- Diagnosing OBDII code B320C involves using a diagnostic scanner to retrieve the code and then inspecting the middle door window motor, wiring connections, and related components for any visible damage or issues.

4. Can I repair OBDII code B320C on my own?

- Repairing OBDII code B320C may require advanced automotive knowledge and tools. It is recommended to consult a professional mechanic to accurately diagnose and repair the issue.

5. What are some tips for repairing OBDII code B320C?

- Tips for repairing OBDII code B320C include checking the wiring connections for proper continuity, testing the middle door window motor for functionality, and ensuring there are no obstructions preventing the window from moving.

6. Is it safe to continue driving with OBDII code B320C?

- It is not recommended to continue driving with OBDII code B320C, as it can affect the operation of the middle door window and compromise the safety and security of the vehicle.

7. How much does it cost to repair OBDII code B320C?

- The cost to repair OBDII code B320C can vary depending on the underlying cause of the issue, the cost of parts, and the labor rates of the repair shop. It is best to obtain a quote from a trusted mechanic.

8. Can OBDII code B320C be reset without repairs?

- Resetting OBDII code B320C without addressing the underlying issue may temporarily clear the code, but it is likely to reappear if the root cause is not fixed. It is advisable to repair the issue to prevent further problems.

9. Are there any recalls related to OBDII code B320C?

- Recalls related to OBDII code B320C would be specific to certain vehicle makes and models. It is recommended to check with the vehicle manufacturer or a dealership to inquire about any relevant recalls.

10. How can I prevent OBDII code B320C from occurring in the future?

- To prevent OBDII code B320C in the future, it is essential to perform regular maintenance on the vehicle, including checking the condition of the window motors, wiring, and electrical components.