U0639
Network – Generic (CAN Bus) — Code U0639
high
i Description
Diagnostic trouble code U0639 relates to the network – generic (can bus). The vehicle's control module has detected a fault condition in this circuit or system. Consult a manufacturer-specific service manual for detailed information about this code for your particular vehicle.
? Common Causes
- CAN bus wiring fault
- Module offline
- Corroded connector
- Power supply issue to module
! Symptoms
- Multiple warning lights
- Communication error
- Feature inoperative
- No-start condition
# Diagnostic Steps
- Check CAN bus wiring continuity
- Inspect module connectors
- Test module power and ground
- Scan all modules for related codes
⚙ Typical Fix
Diagnose and repair the network – generic (can bus) fault. Inspect wiring, connectors, and the related component. Replace as necessary.
Parts Needed
Refer to manufacturer service manual for specific parts
Estimated Cost
$200-$1000
↔ Related Codes
Q Frequently Asked Questions
Code U0639 indicates a potentially serious issue with the network – generic (can bus). Have it diagnosed as soon as possible to avoid further damage or safety concerns.
Repair costs vary depending on the specific cause. For network – generic (can bus) issues, expect to pay $200-$1000 in Australia, including parts and labour. Get a proper diagnosis before committing to repairs.
☞ Learn More
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- What is OBD-II? — Complete guide to your car's diagnostic system
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- OBD-II Scanner Buying Guide — Find the best scanner for your car