U0139 GMC Code - Lost Communication With Suspension Control Module
Quick Answer
The U0139 diagnostic trouble code (DTC) for GMC vehicles indicates that there is a communication issue between the vehicle's onboard computer system and the suspension control module. Common causes include Faulty wiring or loose connections between the onboard computer system and suspension control module, Malfunctioning suspension control module, Issues with the vehicle's CAN (Controller Area Network) communication system. 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
- U0139 GMC indicates Lost Communication With Suspension Control Module.
- Common causes
- Common causes include Faulty wiring or loose connections between the onboard computer system and suspension control module, Malfunctioning suspension control module, Issues with the vehicle's CAN (Controller Area Network) communication system.
- 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.
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Code U0139 GMC Description
The U0139 diagnostic trouble code (DTC) for GMC vehicles indicates that there is a communication issue between the vehicle's onboard computer system and the suspension control module. The suspension control module is responsible for managing and controlling the vehicle's suspension system, including features like adjustable ride height, adaptive damping, and other related functions. When communication is lost with this module, it can lead to a variety of performance issues and potentially affect the overall driving experience.
Common Causes of U0139 GMC
- Faulty wiring or loose connections between the onboard computer system and suspension control module
- Malfunctioning suspension control module
- Issues with the vehicle's CAN (Controller Area Network) communication system
- Water or moisture damage affecting the connections or components
- Electrical system malfunctions or shorts
Symptoms of U0139 GMC
- Dashboard warning lights related to the suspension system
- Unusual or erratic suspension behavior, such as a bumpy ride or sagging suspension
- Difficulty controlling the vehicle, especially over bumps or rough terrain
- Uneven tire wear or abnormal tire alignment
How to Fix U0139 GMC
- Begin by performing a thorough inspection of the wiring and connections between the onboard computer system and the suspension control module. Look for any signs of damage, corrosion, or loose connections that may be causing the communication issue.
- Use a diagnostic scanner to reset the DTC and attempt to establish communication between the two systems. Ensure that the suspension control module is responding correctly and providing accurate data to the onboard computer.
- If the issue persists, consider replacing the suspension control module with a new or refurbished unit. Ensure that the replacement module is compatible with the vehicle's make and model.
- Test the vehicle's suspension system after the repair to verify that the communication issue has been resolved. Check for any warning lights on the dashboard and ensure that the suspension functions properly.
- Clear the DTC from the vehicle's onboard computer system and perform a final test drive to confirm that the repair was successful and that the U0139 code does not reappear.
Cost to Fix U0139 GMC
The cost of repairing a U0139 DTC related to a lost communication with the suspension control module can vary depending on the specific cause of the issue and the extent of the repair needed. In general, the cost of parts for this repair can range from $200 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for this issue typically falls within the range of $300 to $800.
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Frequently Asked Questions about U0139 GMC Code
1. What are common symptoms of OBDII code U0139 GMC (Lost Communication With Suspension Control Module)?
- Common symptoms include illuminated dashboard warning lights, suspension issues, and difficulty controlling the vehicle's ride height.
2. What are possible causes of code U0139 indicating lost communication with the suspension control module?
- Possible causes include wiring issues, a faulty suspension control module, a defective CAN bus network, or a problem with the power supply to the module.
3. How can I diagnose OBDII code U0139 related to the suspension control module?
- Diagnose the code by checking the suspension control module for power and ground, inspecting the wiring for damage, and using a diagnostic scanner to retrieve specific error codes.
4. What are some general repair tips for fixing the U0139 code related to the suspension control module?
- Repair tips include checking and repairing any damaged wiring, ensuring proper power supply to the module, and resetting the code after addressing any underlying issues.
5. Can I drive my vehicle with the U0139 code indicating lost communication with the suspension control module?
- It is generally not recommended to drive the vehicle with this code present, as it can affect the performance and safety of the suspension system.
6. How much does it typically cost to repair OBDII code U0139 GMC (Lost Communication With Suspension Control Module)?
- Repair costs can vary depending on the specific issue causing the code, but they may range from $100 to $500 or more, including parts and labor.
7. Is it possible to reset the U0139 code related to the suspension control module without fixing the underlying issue?
- While you can clear the code temporarily, it will likely reappear until the root cause of the communication loss is addressed and repaired.
8. Can a DIY enthusiast fix the U0139 code indicating lost communication with the suspension control module?
- Depending on the specific issue, a DIY enthusiast with automotive repair experience may be able to diagnose and repair the problem, such as checking wiring connections or replacing a module.
9. How urgent is it to address OBDII code U0139 GMC (Lost Communication With Suspension Control Module)?
- It is recommended to address this code promptly to prevent further damage to the suspension system and ensure the overall safety and performance of the vehicle.
10. Are there any recalls or technical service bulletins related to OBDII code U0139 GMC?
- It is advisable to check with the manufacturer, dealership, or online databases for any recalls or technical service bulletins related to this specific OBDII code and affected vehicles.
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