Free OBD2 & Car Repair Tools
Know severity and fair cost before you pay a shop. All tools run in your browser.
Check Engine Light Severity Checker
Enter a DTC (P0420, P0300…). See if you can drive, urgency, and common causes.
Open tool →Car Repair Cost Calculator
Fair-price ranges for catalytic converters, O2 sensors, coils, brakes, and more.
Open tool →OBD-II Code Lookup
Instant lookup for diagnostic trouble codes with fix guidance.
Open tool →AutoDiag Pro
Severity, fair price check, and sell-or-fix decision in one tool.
Open tool →