OBD2 Code U0097: Reserved CAN Bus Fault
Diagnostic trouble code U0097 is a reserved code under the SAE J2012 standard, meaning it has no officially assigned fault definition in the public specification. It falls within the U0090-U009F range, which is set aside for future assignments by the SAE committee. When this code appears on a scan tool, it typically indicates a misreading, outdated diagnostic software, or proprietary use by the vehicle manufacturer that is not publicly documented. It may also result from a transient CAN bus communication error or a control module fault generating a non-standard code.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Reserved code per SAE J2012 with no official definition
- Outdated scan tool software misinterpreting module data
- Proprietary undocumented use by the vehicle manufacturer
- Transient CAN bus communication error not otherwise classified
- Control module fault generating a non-standard code
3. Symptoms You Will Notice
- Check Engine Light illuminated
- Possible intermittent communication issues with other modules
4. Step-by-Step Diagnosis
Verify the code with an up-to-date professional scan tool to rule out misinterpretation
Check for any technical service bulletins (TSBs) related to the vehicle make and model
Inspect CAN bus wiring and connectors for damage or corrosion
Update scan tool software and re-scan to see if the code reappears
If code persists, consult manufacturer-specific diagnostic resources or contact technical support
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive short distances, but the underlying issue may cause intermittent communication problems. Have it diagnosed promptly to avoid potential drivability issues.
How much does it cost to fix?▼
Costs vary widely depending on the root cause. Diagnostic fees typically range from $100 to $200. If a module replacement is needed, costs can exceed $1,000. Simple software updates may cost less than $100.