AI-Style Diagnostic Assistant
Combine vehicle, symptoms, fault codes and risk signals into a practical inspection order before replacing parts.
Interactive preview
Rule-based guidance, not a final repair diagnosis.
Suggested direction
For P0420 with engine shaking, save freeze-frame data, check related codes, inspect connectors and hoses, then verify live data before replacing parts.
This tool helps prioritize checks. Safety-critical symptoms, fuel leaks, brake faults and flashing check engine lights should be inspected by a qualified technician.
How to use this tool safely
- Save the original code and freeze-frame data before clearing anything.
- Use the result as an inspection order, not as proof that a part is bad.
- Confirm power, ground, signal, vacuum, pressure or mechanical condition before replacing expensive parts.