Understanding “Scan Tool Reads Distance Since Trouble Codes Cleared”

A scan tool reading the distance since trouble codes were cleared is a valuable piece of information for diagnosing intermittent car problems. This reading tells you how many miles the vehicle has traveled since the last time the diagnostic trouble codes (DTCs) were erased. This data point can be crucial in pinpointing the root cause of elusive issues and preventing unnecessary part replacements.

What Does “Distance Since Codes Cleared” Mean?

Simply put, “distance since codes cleared” refers to the mileage accumulated after a diagnostic trouble code (DTC) has been cleared from the vehicle’s computer. This metric, readily available through most OBD-II scan tools, provides technicians and car owners with valuable insights into the nature of the vehicle’s issue. It helps determine if a problem is truly resolved or just temporarily suppressed.

Why is the “Distance Since Codes Cleared” Reading Important?

This reading is crucial for several reasons:

• Identifying Intermittent Problems: Intermittent issues can be incredibly frustrating to diagnose. This reading helps track how often a problem reoccurs after the codes are cleared, providing a clearer picture of the issue’s frequency and potential triggers.
• Confirming Repairs: After a repair, this reading confirms whether the fix was successful. If the code reappears shortly after clearing, it indicates the problem wasn’t adequately addressed.
• Preventing Unnecessary Part Replacements: By monitoring the distance driven since the codes were cleared, you can avoid replacing parts unnecessarily. This saves both time and money.
• Meeting Emissions Requirements: Some emissions tests require a certain driving distance after clearing codes before the vehicle can be re-tested. This reading helps ensure compliance.

How to Use “Distance Since Codes Cleared” for Diagnostics

Understanding how to interpret this reading is essential for effective diagnostics. Here’s a step-by-step guide:

1. Connect your OBD-II scan tool: Ensure the tool is compatible with your vehicle’s make and model.
2. Retrieve Diagnostic Trouble Codes (DTCs): Note down all the codes displayed.
3. Clear the Codes: Use the scan tool to erase the stored DTCs.
4. Drive the Vehicle: Operate the vehicle under normal driving conditions, replicating the circumstances under which the problem typically occurs.
5. Reconnect the Scan Tool: After the problem reoccurs (if it does), reconnect the scan tool.
6. Check “Distance Since Codes Cleared”: Note the mileage recorded. This information, combined with the reappearing DTCs, can significantly narrow down the potential causes.

Common Scenarios and Interpretations

• Short Distance: If the code reappears after a short distance, it suggests a persistent problem that needs immediate attention.
• Long Distance: If the code reappears after a significant distance, it could indicate an intermittent problem or a slowly developing fault.
• No Code Reappearance: If the code doesn’t reappear after a reasonable driving distance, the repair likely resolved the issue, or the problem was truly intermittent and not currently present.

Troubleshooting Tips using “Distance Since Codes Cleared” Data

Here are some tips to effectively use this data:

• Keep a Log: Maintain a detailed log of the “distance since codes cleared” readings along with the corresponding DTCs and any repairs performed. This provides a valuable history for future diagnostics.
• Consult Repair Manuals: Use reliable repair manuals specific to your vehicle’s make and model. These resources often provide insights into common problems associated with specific DTCs and mileage readings.
• Seek Professional Help: If you’re struggling to diagnose the issue, don’t hesitate to consult a qualified automotive technician.

“Paying attention to the ‘distance since codes cleared’ is like following breadcrumbs in a fairytale. It leads you straight to the source of the problem,” says John Miller, ASE Certified Master Technician. “It’s often overlooked, but it’s a powerful tool for any technician.”

Car Diagnostic Report Showing Distance Since Codes Cleared and Trouble Codes

Conclusion

The “Scan Tool Reads Distance Since Trouble Codes Cleared” feature is an invaluable tool for diagnosing car problems. By understanding how to interpret this data, you can pinpoint intermittent issues, confirm repairs, and avoid unnecessary part replacements. Remember to keep a detailed log and consult reliable resources. If you are still experiencing issues, reach out to CARW Workshop at +1 (641) 206-8880 or visit our office at 4 Villa Wy, Shoshoni, Wyoming, United States for assistance.

“Using this feature effectively can save you both time and money in the long run,” adds Sarah Chen, Automotive Electronics Engineer at a leading automotive research facility. “Don’t underestimate the power of this simple yet powerful diagnostic metric.”

FAQ

1. What is an OBD-II scan tool? An OBD-II scan tool is a device used to read and clear diagnostic trouble codes from a vehicle’s computer.
2. Where can I find the “distance since codes cleared” reading? This reading is typically found within the diagnostic data section of your OBD-II scan tool’s menu.
3. Can I reset the “distance since codes cleared” reading? The reading resets automatically each time the DTCs are cleared.
4. What if my scan tool doesn’t show this reading? Some older or basic scan tools may not have this feature. Consider upgrading to a more advanced model.
5. Does this reading apply to all vehicles? Most vehicles manufactured after 1996 in the US are equipped with OBD-II systems and should provide this reading.
6. What does a high mileage reading indicate? A high mileage reading, coupled with a recurring DTC, could indicate an intermittent problem or a component that is nearing the end of its lifespan.
7. How can I learn more about using a scan tool effectively? Many online resources and automotive training programs offer comprehensive guidance on using scan tools for diagnostics.