U0140 GMC Code - Lost Communication With Body 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 Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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
- U0140 GMC indicates Lost Communication With Body Control Module.
- Common causes
- Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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 U0140 GMC Description
Pictures shown may vary from actual
What are the Possible Causes of the DTC U0140 GMC?
- Faulty Body Control Module (BCM)
- Body Control Module harness is open or shorted
- Body Control Module circuit poor electrical connection
How to Fix the DTC U0140 GMC?
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
2007-2010 GMC Sierra
2007-2010 GMC Yukon Models
2008-2010 GMC Sierra Hybrid
2008-2010 GMC Yukon Hybrid
GMC Factory Service Bulletin OBDII Code U0140
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U0140 GMC 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 U0140 GMC code?
Need more information on how to fix the U0140 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U0140 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U0140 GMC Code
1. What are common symptoms of OBDII code U0140 (Lost Communication With Body Control Module) in a GMC vehicle?
- Common symptoms include issues with power windows, door locks, interior lights, and other body control functions.
2. What are possible causes of the U0140 trouble code in a GMC vehicle?
- Possible causes include a faulty body control module, wiring issues, loose connections, or a malfunctioning communication network.
3. How can I diagnose the U0140 code in my GMC vehicle?
- Diagnose the U0140 code by using a professional OBDII scanner to retrieve the specific details of the code and inspecting the body control module and related wiring for any visible issues.
4. Can I still drive my GMC vehicle with the U0140 code present?
- It is not recommended to drive the vehicle with the U0140 code present, as it may lead to further electrical malfunctions and safety concerns.
5. What are some repair tips for resolving the U0140 code in a GMC vehicle?
- Repair tips include checking and repairing any damaged wiring, ensuring all connections are secure, and, if needed, replacing the body control module.
6. Is it necessary to reset the U0140 code after making repairs in a GMC vehicle?
- Yes, it is important to clear the U0140 code after making repairs to ensure the issue has been resolved and to prevent any further confusion during future diagnostics.
7. How much does it typically cost to repair the U0140 code in a GMC vehicle?
- The cost of repairing the U0140 code can vary depending on the specific cause of the issue, but it may range from a couple of hundred to a few hundred dollars for parts and labor.
8. Can a DIY enthusiast fix the U0140 code issue in a GMC vehicle?
- While some DIY enthusiasts may have the skills to diagnose and repair the U0140 code, it is recommended to seek professional help due to the complexity of electronic systems in modern vehicles.
9. Are there any preventive measures to avoid the U0140 code in a GMC vehicle?
- Regularly inspecting and maintaining the electrical components in your GMC vehicle, such as checking for loose connections and addressing wiring issues promptly, can help prevent the U0140 code from occurring.
10. How long does it typically take to repair the U0140 code in a GMC vehicle?
- The repair time for the U0140 code can vary depending on the exact cause of the issue and the availability of parts, but it may take a few hours to a day for a professional technician to diagnose and repair the problem.
Discuss the causes and fixes for U0140 GMC OBDII Code
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2007 GMC YUKON i CANT START THE CAR ALL LIGHTS ON IN THE DASH BUT THE GAUGES NOT WORKING NO CRANKING AT ALL I PUT MY OBD MACHINE ON IT GIVE ME CODE U0140 LOST COMMUNICATION WITH BCM WHAT I HAVE TO START WITH
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Unfortunately there are many things that could cause the symptoms you have, but there is a factory service bulletin for you model year with the U0140 code. The factory recommends inspect the transmission connector. Make sure the connector and connectors pins are firmly secure
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