B320B Cadillac 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 Cadillac 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 Cadillac Description
What are the Possible Causes of the DTC B320B Cadillac?
- 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 Cadillac?
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 Cadillac 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 B320B Cadillac code?
Need more information on how to fix the B320B Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B320B Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B320B Cadillac Code
1. What does the OBDII code B320B mean on a Cadillac?
The code B320B indicates an issue with the rear door window motor circuit, such as a malfunction or communication error.
2. What are the common symptoms of code B320B?
Symptoms include the rear door window not functioning, unusual noises from the motor, or intermittent window operation.
3. What causes code B320B to appear?
Possible causes include a faulty rear door window motor, damaged wiring or connectors, or a failure in the power window control module.
4. Can I still drive my Cadillac with a B320B code?
Yes, the vehicle is safe to drive, but the rear door window may not operate correctly, which could be inconvenient.
5. How do I diagnose the B320B code?
Start by inspecting the rear door window motor, checking for loose or damaged wiring, and testing the motor for proper operation.
6. How can I fix code B320B on my Cadillac?
Repairs may involve replacing the rear door window motor, repairing damaged wiring, or reprogramming the power window control module.
7. Is replacing the rear door window motor expensive?
The cost varies depending on the model and labor rates, but replacing the motor typically ranges from $150 to $300.
8. Can I reset the B320B code without fixing the issue?
You can clear the code with an OBDII scanner, but if the issue isn’t resolved, the code will likely return.
9. Could a blown fuse cause the B320B code?
Yes, a blown fuse in the rear door window circuit could trigger this code, so checking fuses is a good starting point.
10. Do I need a professional mechanic to fix the B320B code?
While some repairs, like replacing a fuse or inspecting wiring, can be done at home, more complex issues may require a professional.
Discuss the causes and fixes for B320B Cadillac OBDII Code
Code B320B Cadillac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
