Use any OBD-II scanner or a free app like Torque Pro on your car's OBD port under the dashboard. Note the fault codes shown.
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Enter the Code Here
Type the code (e.g. P0420) into the search box above. Our database covers 3,722+ generic and manufacturer-specific codes.
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Read the Plain-Language Report
Get a human-friendly explanation, ECU threshold data, symptoms checklist, and a prioritised fix guide — no mechanic jargon.
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Fix or Inform Your Mechanic
Use the DIY guide to attempt simple fixes yourself, or share the technical breakdown with your mechanic for faster, accurate service.
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Disclaimer & Safe Use
This tool provides diagnostic information for reference purposes. OBD-II codes indicate a fault was detected by the ECM but do not pinpoint the exact failed component — they identify the system or circuit that is out of specification. Always verify diagnosis with live sensor data before replacing parts. For safety-critical systems (brakes, airbags, steering), consult a certified mechanic.