Free car tools
Look up a trouble code, check model-year recalls, or decode a VIN, from official US government data. Then start a case for whatever you find.
- OBD-II library
OBD code list
Browse common check-engine trouble codes — what they mean, likely causes and common fixes. Free for everyone.
FreeOpen - NHTSA recalls
Recall checker
See the NHTSA recalls issued for your vehicle’s model year. Whether one is open on your car depends on the VIN; safety recalls are repaired free at the dealer.
FreeOpen - NHTSA vPIC
VIN decoder
Decode any 17-character VIN into year, make, model, trim, engine, drivetrain — plus recalls and top complaints.
FreeOpen - OBD-II library
Code lookup
Search any trouble code and go straight to what it means, likely causes and usual fixes.
FreeOpen - Live OBD · Beta
Live OBD
Read codes and live data through a standard Bluetooth LE adapter. Real-car validation is ongoing; availability and supported data vary by vehicle and adapter.
DiamondExplore the demo
Data: NHTSA recalls and owner complaints, and NHTSA vPIC for VIN decoding, all official US government sources.
Found a problem?
Every problem becomes a Case. Tell Redline what the car is doing: it shows what the evidence supports, what’s still missing, and what to check next.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.