Diagnostic Guide for OBD-II Code U0319
Quick Answer
What U0319 Means
U0319 - for OBD-II Code U0319. This affects your vehicle's network communication system.
Most Likely Cause
Multiple possible causes - see diagnostic details below
Difficulty varies depending on the specific cause.
Generally safe to drive short-term. Have it diagnosed soon.
Safe to Drive (Short-Term)
Generally safe to drive short-term. Have it diagnosed soon.
Don't Have a Scanner?
Need Personalized Help?
Our AI can help diagnose your specific situation and answer follow-up questions.
Detailed Diagnostic Information
1) Quick reference (what this guide covers)
- Code family: U (network/communications) DTCs in OBD-II
- Generic meaning: U codes indicate data link/network communication issues between control modules on the vehicle. They are typically not tied to a single sensor but to the integrity of the vehicle's communication bus(es) (CAN, LIN, FlexRay, etc.).
- Specific code: U0319 is a member of the U-code family. The exact manufacturer-specific definition for U0319 can vary by vehicle and model year; consult the vehicle's service information or a manufacturer database for the precise description on a given vehicle. This is consistent with the general statement that U-codes are network/communication codes with device- and bus-specific meanings.
- Typical symptoms you may observe: MIL illuminated or blinking, multiple modules reporting lack of communication, inability to retrieve data from certain modules, comfort/driver-assist features behaving erratically, and intermittent or persistent loss of module communications.
This diagnostic guide was generated using verified reference data:
- Wikipedia Technical Articles: OBD-II
Content synthesized from these sources to provide accurate, real-world diagnostic guidance.
Consider professional help if:
- You are not comfortable performing the diagnosis yourself
- The issue requires specialized tools or equipment
- Initial repairs did not resolve the code
- Multiple codes are present simultaneously
- The vehicle is still under warranty
Frequently Asked Questions
What does code U0319 mean?
U0319 indicates Diagnostic Guide for OBD-II Code U0319. This is a network code related to the network communication system. When your vehicle's computer detects this condition, it stores this code and may illuminate the check engine light.
Can I drive with code U0319?
You may be able to drive short distances with U0319, but it should be addressed soon. Extended driving could lead to additional problems or increased repair costs.
How much does it cost to fix U0319?
Repair costs for U0319 typically range from $100-$800, depending on the root cause and your vehicle. Diagnostic fees are usually $50-$150, and actual repairs vary based on whether parts need replacement. Get multiple quotes for the best price.
What causes code U0319?
Common causes of U0319 include sensor malfunctions, wiring issues, mechanical failures in the network communication system, or related component wear. The specific cause requires proper diagnosis with a scan tool and visual inspection.
Will U0319 clear itself?
U0319 may temporarily clear if the underlying condition improves, but the root cause should still be diagnosed. If the problem persists, the code will return.
Related Diagnostic Codes
Important Disclaimer
This information is for educational purposes only. We are not licensed mechanics. Always consult a certified mechanic for diagnosis and repair. Improper repairs can be dangerous.
Helpful Resources
Last updated: 2025-11-26