About AutoFaultCodes.com
This site is designed as a diagnostic starting point, not a parts cannon. The rebuilt content emphasizes exact code scope, evidence preservation, system testing, and clear limits when a definition depends on the vehicle manufacturer.
What changed in the 2026 rebuild
- Removed broad cause/symptom templates that incorrectly treated unrelated DTCs as the same fault.
- Separated standardized generic P0xxx codes from manufacturer-specific P1xxx codes.
- Removed unsupported repair-cost guesses and “most common fix” claims.
- Added code-aware scan-data guidance, diagnostic workflows, severity language, and common-mistake warnings.
- Pages without a defensible universal definition explicitly require vehicle-specific verification rather than being filled with invented content.
Core diagnostic principles
- Record freeze-frame and related codes before clearing.
- A DTC reports a monitored condition; it usually does not prove a component has failed.
- Electrical codes require circuit testing; performance codes may be mechanical, hydraulic, pneumatic, software, or electrical.
- Vehicle service information and applicable TSBs take priority over generalized web guidance.
Editorial scope
AutoFaultCodes.com focuses on OBD-II diagnostic education. It does not provide VIN-specific repair instructions, guaranteed repair outcomes, labor-time estimates, or safety-critical procedures that require factory tooling/training.