Automotive Glossary

Definitions for common vehicle and diagnostic terms.

ABS
Anti-lock braking system.
ADAS
Advanced driver-assistance systems.
DTC
Diagnostic trouble code.
Freeze-frame data
Sensor values recorded when a fault code set.
Limp mode
A reduced-performance strategy used after some faults.
OBD-II
Standardized on-board diagnostics for emissions-related monitoring.
OEM
Original equipment manufacturer.
TPMS
Tire pressure monitoring system.
VIN
Vehicle identification number.