Do OBD-II codes differ between vehicle manufacturers?

Yes, while P-codes (powertrain) follow SAE J2012 standards, manufacturers may implement additional parameters or variations. U-codes (network communication) are particularly manufacturer-specific and can have different meanings for different brands.

Why might the same code mean different things on different cars?

Vehicle manufacturers can customize OBD-II code implementations based on their specific systems, sensors, and control modules. The same code might trigger different diagnostic procedures or indicate different components depending on the vehicle's make, model, and year.

Should I always check my vehicle's service manual?

Absolutely. Your vehicle's official service manual provides manufacturer-specific interpretations, diagnostic procedures, and repair instructions tailored to your exact model. Generic OBD-II code databases provide general guidance, but factory documentation ensures accurate diagnosis.

What are U-codes and how do they differ from P-codes?

U-codes (U0000-U3FFF) are network communication codes that indicate issues with vehicle communication networks like CAN bus, LIN, or other protocols. Unlike P-codes (powertrain), U-codes are highly manufacturer-specific and often require specialized diagnostic tools.

OBD-II Diagnostic Trouble Codes Database

Over 20K+ codes with detailed explanations, symptoms, causes, and repair solutions. Fast search, free access, and professional-grade information for mechanics and car enthusiasts.

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Important Notice

OBD-II diagnostic codes can vary by vehicle manufacturer, model year, and specific configuration. While P-codes (powertrain) follow SAE J2012 standards, U-codes (network communication) and manufacturer-specific interpretations may differ. Always consult your vehicle's service manual or a qualified technician for accurate diagnosis.

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