What to Do if Your Vehicle Fails a Smog Check: Common Fixes
June 11, 2025
How to Resolve Issues if Your Vehicle Fails a Smog Check
June 11, 2025
If your car didn’t pass the smog check, don’t panic. There are specific steps you can follow to ensure a smooth path to retesting. Acting quickly will save time and money.
Understand the Reason for the Smog Check Failure
Request a detailed report from the technician to find out why your car failed the smog check. This report often includes diagnostic trouble codes (DTCs) that guide your next steps for repairs.
Seek Professional Diagnosis and Repairs
Once you know what failed, visit a certified repair shop. Technicians will inspect emissions-related systems and recommend necessary repairs. Accurate diagnostics are essential for a successful retest.
Drive Your Vehicle Before Returning for a Smog Check
After repairs, drive your vehicle for at least 100 miles under various conditions. This allows the onboard diagnostic system to reset and ensures accurate smog check results during the retest.
Schedule a Timely Retest at a Smog Check Station
Many states offer a free or discounted retest if it’s done within a certain time frame. Confirm with your local smog check station and ensure your car is fully ready for another inspection.
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