onboard diagnostics
Car's internal monitor
Onboard diagnostics refers to a vehicle's built-in computer system that monitors engine performance and emissions.
The system detects malfunctions and stores error codes that mechanics retrieve with diagnostic tools.
OBD-II, the standardized version required in cars since 1996, allows any compatible scanner to read trouble codes: The check engine light came on, so I plugged in an OBD reader.
- check engine lightDashboard diagnostic warning lamp
- trouble codesStored vehicle malfunction identifiers
- catalytic converterExhaust detoxification unit
- emissions testingMeasuring vehicle exhaust pollutants
- fuel injectorEngine's liquid atomizer
- car electronicsstereo, car radio, backup camera, rearview camera, bluetooth module
- telematicstelematics, telemetry, GPS tracking, fleet management, vehicle tracking
- auto maintenanceoil change, tire rotation, transmission, coolant flush, battery check
- smart transittraffic management, traffic lights, traffic cameras, real-time data, pedestrian signals
diagnostic vs. remedial action
onboard diagnosticsrepair
Restore to working order
vehicle repair · remediation · fixing · servicing · restoration
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