B396C GMC Code - Liftgate Mode Switch Circuit Performance Signal Invalid
Quick Answer
The B396C GMC diagnostic trouble code (DTC) indicates an issue with the liftgate mode switch circuit performance signal being invalid. Common causes include Faulty liftgate mode switch, Wiring or connection issues in the liftgate circuit, Malfunctioning control module. 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
- B396C GMC indicates Liftgate Mode Switch Circuit Performance Signal Invalid.
- Common causes
- Common causes include Faulty liftgate mode switch, Wiring or connection issues in the liftgate circuit, Malfunctioning control module.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code B396C GMC Description
The B396C GMC diagnostic trouble code (DTC) indicates an issue with the liftgate mode switch circuit performance signal being invalid. The liftgate mode switch is a component that allows the driver or passengers to control the opening and closing of the liftgate on the vehicle. When this circuit's performance signal is deemed invalid, it means that there is a problem with the electrical communication between the liftgate mode switch and the vehicle's control module.
Common Causes of B396C GMC
- Faulty liftgate mode switch.
- Wiring or connection issues in the liftgate circuit.
- Malfunctioning control module.
- Water or moisture damage to the liftgate components.
- Physical damage to the liftgate or its components.
Symptoms of B396C GMC
- Liftgate does not respond to commands to open or close.
- Warning light on the dashboard indicating an issue with the liftgate.
- Liftgate opens or closes intermittently or erratically.
- Strange noises coming from the liftgate when operating it.
- Liftgate may not lock properly when closed.
How to Fix B396C GMC
- Start by inspecting the liftgate mode switch and its wiring for any visible damage or loose connections. Replace or repair any damaged components.
- Use a diagnostic tool to check for any trouble codes stored in the vehicle's system and clear them if necessary.
- Test the liftgate mode switch and circuit to ensure they are functioning properly.
- If the issue persists, check the control module for any faults and replace if necessary.
- Finally, test the liftgate operation to confirm that the issue has been resolved.
Cost to Fix B396C GMC
The cost of repairing a B396C GMC code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair cost for this type of issue can range from $100 to $300, including parts and labor. However, it is essential to keep in mind that labor rates can vary significantly depending on the location, vehicle make and model, and the expertise of the technicians. It is advisable to contact local auto repair shops for a more accurate estimate based on your specific circumstances.
Need more information about the B396C GMC code?
Need more information on how to fix the B396C GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B396C GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B396C GMC Code
1. What does the OBDII code B396C on a GMC indicate?
The B396C code indicates a problem with the liftgate mode switch circuit, specifically that the switch is sending an invalid signal to the vehicle's control system.
2. What are common symptoms of the B396C code in a GMC?
Common symptoms include the liftgate not operating properly, the liftgate switch not responding, or warning lights appearing on the dashboard.
3. What can cause the B396C code to appear in a GMC?
The code can be triggered by a faulty liftgate mode switch, damaged wiring in the liftgate circuit, or issues with the liftgate control module.
4. How do you diagnose the B396C code in a GMC?
Diagnosis involves using a scan tool to read the fault code and examining the liftgate mode switch and its connections for any signs of damage or malfunction. Checking the continuity and voltage in the liftgate circuit with a multimeter can also be helpful.
5. What are the steps to fix the B396C code in a GMC?
Repairing the B396C code typically involves replacing the faulty liftgate mode switch, repairing or replacing damaged wiring, or resetting the liftgate control module. After repairs, the fault codes should be cleared from the system to see if the issue persists.
6. Is it safe to drive a GMC with the B396C code?
While it may be safe to drive, the functionality of the liftgate may be impaired. It's advisable to address the issue promptly to ensure all vehicle features are working correctly.
7. How urgent is it to fix a B396C code in a GMC?
It is moderately urgent to fix this issue as it affects the functionality of the liftgate, which could compromise convenience and security.
8. Can a B396C code affect the overall performance of my GMC?
The B396C code primarily affects the liftgate operation and does not typically impact the engine or overall driving performance of the vehicle.
9. What tools are needed to diagnose and fix the B396C code?
Tools needed may include a diagnostic scan tool, a multimeter for electrical testing, and basic hand tools for accessing and replacing components.
10. Could a B396C code come back after it has been cleared in a GMC?
Yes, if the underlying issue is not properly addressed, the B396C code can reappear. Ensuring a thorough diagnosis and addressing all aspects of the issue are crucial for a permanent fix.
Discuss the causes and fixes for B396C GMC OBDII Code
Code B396C GMC 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.