U1147 Chevrolet Code - Lost Communication With Onstar
Quick Answer
The U1147 code for Chevrolet vehicles indicates that there is a communication issue with the OnStar system. Common causes include Faulty OnStar module, Wiring issues or loose connections, Software glitch in the vehicle's computer 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
- U1147 Chevrolet indicates Lost Communication With Onstar.
- Common causes
- Common causes include Faulty OnStar module, Wiring issues or loose connections, Software glitch in the vehicle's computer 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 U1147 Chevrolet Description
The U1147 code for Chevrolet vehicles indicates that there is a communication issue with the OnStar system. OnStar is a subscription-based service that provides various features such as emergency assistance, navigation, and remote vehicle diagnostics. When this code is triggered, it means that the vehicle's onboard computer is unable to communicate with the OnStar system, which can lead to a loss of functionality and potentially impact the vehicle's performance.
Common Causes of U1147 Chevrolet
- Faulty OnStar module
- Wiring issues or loose connections
- Software glitch in the vehicle's computer system
- Malfunctioning main computer system
- Interference from other electronic devices
Symptoms of U1147 Chevrolet
- OnStar system not responding or displaying error messages
- Loss of access to OnStar features such as emergency assistance or navigation
- Check engine light illuminated on the dashboard
- Vehicle may experience intermittent connectivity issues with other systems
How to Fix U1147 Chevrolet
- Begin by checking the wiring and connections related to the OnStar system to ensure there are no loose or damaged components.
- If the wiring appears to be intact, proceed to inspect the OnStar module itself for any signs of damage or malfunction. Replace the module if necessary.
- Perform a diagnostic scan of the vehicle's computer system to identify any software glitches that may be causing the communication issue. Update or reprogram the software as needed.
- If the problem persists, consult with a professional mechanic or dealership to further diagnose and repair any underlying issues with the vehicle's main computer system.
- Once the repairs have been completed, clear the U1147 code from the vehicle's computer system and test the OnStar communication to ensure it is functioning properly.
Cost to Fix U1147 Chevrolet
The cost of repairing a U1147 code on a Chevrolet vehicle can vary depending on the specific cause of the communication issue. In general, the cost of parts for replacing an OnStar module or repairing wiring issues can range from $100 to $500. Labor costs at an auto repair shop typically range from $80 to $150 per hour, with the total repair bill potentially amounting to several hundred dollars. It's advisable to consult with a professional mechanic for a more accurate estimate based on the specific circumstances of the vehicle.
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Frequently Asked Questions about U1147 Chevrolet Code
What does the OBDII code U1147 mean for my Chevrolet?
The U1147 code indicates that there is a lost communication issue with the OnStar system in your Chevrolet vehicle.
What symptoms might I notice if my vehicle has the U1147 code?
Common symptoms include the OnStar system not responding, failure of remote services, and potential warning lights on the dashboard.
What could cause the U1147 code to appear?
Causes can include a faulty OnStar module, wiring issues, blown fuses, or problems with the vehicle’s communication network.
How can I diagnose the U1147 code?
Start by checking for any blown fuses, inspect the wiring and connectors for damage, and use a scan tool to check for additional trouble codes that may provide more context.
What should I do if I find the U1147 code?
If you encounter the U1147 code, check the OnStar module and its connections first. If necessary, consult a professional mechanic for further diagnosis.
Can I clear the U1147 code without fixing the problem?
While you can clear the code with an OBDII scanner, the issue may reoccur if the underlying problem is not addressed.
Is there a chance that the U1147 code is a temporary issue?
Yes, it's possible that the code could be a temporary glitch, especially if it appears after a battery disconnect or a software update. However, persistent codes typically indicate a deeper issue.
How much might it cost to repair the issue related to the U1147 code?
Repair costs can vary widely but might range from a simple fuse replacement to hundreds of dollars if the OnStar module needs replacement.
Can I still drive my Chevrolet if the U1147 code is present?
Yes, you can still drive the vehicle, but you may lose access to certain OnStar features until the issue is resolved.
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