B320B Code - Rear 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 Rear Door Window Motor, Rear Door Window Motor harness is open or shorted, Rear 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
- B320B indicates Rear Door Window Motor.
- Common causes
- Common causes include Faulty Rear Door Window Motor, Rear Door Window Motor harness is open or shorted, Rear 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.
Code B320B Description
What are the Possible Causes of the DTC B320B?
- Faulty Rear Door Window Motor
- Rear Door Window Motor harness is open or shorted
- Rear Door Window Motor circuit poor electrical connection
- Faulty Rear Door Module
How to Fix the DTC B320B?
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.
Code Tech Notes
B320B 42 Rear Door Window Motor Calibration Data Set Not Programmed
B320B 4B Rear Door Window Motor Calibration Not Learned
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B320B 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.
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Information for Specific Makes
- B320B Buick — Rear Door Window Motor
- B320B Cadillac — Rear Door Window Motor
- B320B Chevrolet — Rear Door Window Motor
- B320B GMC — Rear Door Window Motor
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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