Car & Vehicle Fault Finder

What does that dashboard warning light mean? Find OBD-II fault codes and tyre size answers — instantly, offline, in বাংলা and English, with no account

Car & Vehicle Fault Finder is a driver's pocket guide for the three moments every car owner faces: a warning light appears, a fault code comes back from a scan tool, or you are thinking about changing tyre size.

🔴 Read the colour first — it can save the engine

- Red means stop driving now. Amber means get it checked soon. Blue and green mean something is switched on.
- The oil light, temperature, brake and charging warnings are all marked clearly so you never drive on past a true emergency.
- Every one of the 24 dashboard symbols explains what it means, why it can come on, and what to do — cheapest, safest actions first.

📷 Camera scanners (on-device, private)

Point the camera at a fault code shown on any scan tool's screen — the app reads it for you.
-Point the camera at a lit dashboard symbol — the app suggests the most likely matches to confirm.

🔧 OBD-II fault codes explained properly
- Look up codes like P0420, P0300 or P0135 in plain language.
- A code names a circuit, not a part — the app says so, because replacing parts first is the most expensive mistake.
- Codes outside the list still get their system, type and subsystem read from the code's structure.

🛞 Tyre size calculator

- Understand every part of a size marking like 205/55 R16.
- Compare two sizes and see which way the speedometer will read — and how much clearance changes.

Why drivers like it

- Works fully offline — no internet, no account, no registration.
- Bilingual: বাংলা and English.
- Free, with optional ads.
- Clear, calm instructions for stressful moments, always ending with: your car handbook and a mechanic have the final word.