Live Data
Live data is the stream of sensor values and calculated readings from the control units, shown on a scan tool while the engine runs.
What is Live Data?
It includes values such as coolant temperature, engine speed, fuel trims and sensor voltages. Recording live data during a test drive helps catch intermittent faults. Manufacturer tools show far more values than generic OBD-II.
How it works
The scan tool requests values from the control unit and displays them as numbers or graphs.
Why it matters for your car
Comparing live data with known good values is a key step in diagnosis. Graphs make patterns easier to see than numbers.
Other terms
- ABS Warning Light
- AdBlue Warning Light
- Air Filter
- Battery Electric Vehicle (BEV)
- CHAdeMO Connector
- Cold-Weather Range Loss
- DPF Regeneration
- EV Route Planner
- Fastback
- Heated Door Mirrors
- High-voltage Interlock Loop (HVIL)
- Iron Fallout Remover
- Keyless Entry And Start
- Malfunction Indicator Lamp (MIL)
- Orange Peel (Paint Texture)
- Rear Fog Light
- Refractometer (Coolant And AdBlue Tester)
- Seatbelt Load Limiter
- Torque
- Turning Circle