U0139 Cadillac Code - Lost Communication With Suspension Control Module
Quick Answer
Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Suspension Control Module, Suspension Control Module harness is open or shorted, Suspension Control Module 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
- U0139 Cadillac indicates Lost Communication With Suspension Control Module.
- Common causes
- Common causes include Faulty Suspension Control Module, Suspension Control Module harness is open or shorted, Suspension Control Module 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 U0139 Cadillac Description
What are the Possible Causes of the DTC U0139 Cadillac?
- Faulty Suspension Control Module
- Suspension Control Module harness is open or shorted
- Suspension Control Module circuit poor electrical connection
How to Fix the DTC U0139 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U0139 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.
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Frequently Asked Questions about U0139 Cadillac Code
1. What are the common symptoms of OBDII code U0139 in a Cadillac related to the lost communication with the suspension control module?
- Common symptoms include suspension issues such as a stiff ride, uneven ride height, or the suspension feeling loose or bouncy.
2. What are the possible causes of the U0139 code indicating a lost communication with the suspension control module in a Cadillac?
- Possible causes may include a faulty suspension control module, damaged wiring or connectors, a software issue, or a problem with the vehicle's network communication system.
3. How can I diagnose the U0139 code in my Cadillac indicating a lost communication with the suspension control module?
- Proper diagnosis involves checking the wiring and connectors for any damage, verifying the connections to the suspension control module, and using a diagnostic scanner to communicate with the module.
4. Can I still drive my Cadillac with the U0139 code related to a lost communication with the suspension control module?
- It is not recommended to drive the vehicle with this code present, as it can affect the performance and safety of the suspension system. It is best to address the issue promptly.
5. How can I repair the U0139 code in my Cadillac indicating a lost communication with the suspension control module?
- Repair options may include repairing or replacing damaged wiring, checking and resetting the suspension control module, or updating the software to resolve communication issues.
6. Is it possible to reset the U0139 code in a Cadillac without fixing the underlying issue with the suspension control module?
- While you can clear the code temporarily, it will likely return until the root cause of the communication loss is addressed. It is best to fix the problem to prevent further issues.
7. How much does it typically cost to repair the U0139 code related to the lost communication with the suspension control module in a Cadillac?
- Repair costs can vary depending on the underlying issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.
8. Can a DIY enthusiast fix the U0139 code indicating a lost communication with the suspension control module in a Cadillac?
- While some simple checks like inspecting wiring connections can be done by a DIY enthusiast, diagnosing and repairing complex issues with the suspension control module may require professional expertise.
9. How long does it usually take to repair the U0139 code in a Cadillac due to a lost communication with the suspension control module?
- The repair time can vary based on the exact cause of the issue. Simple fixes like reconnecting a loose wire may take a short time, while more complex repairs involving module replacement could take several hours.
10. What are the potential risks of ignoring the U0139 code indicating a lost communication with the suspension control module in a Cadillac?
- Ignoring this code can lead to further damage to the suspension system, affecting ride comfort, handling, and overall safety. It is advisable to address the issue promptly to prevent any potential risks.
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