Main functions of a Bluetooth OBD-II Car Controller:
Fault diagnosis & clearing of trouble codes (DTCs)
Reads and clears stored trouble codes in the engine control unit (ECU).
Supports both generic and manufacturer-specific trouble codes.
Detects check engine lights (MIL) and other warning messages.
Real-time monitoring of vehicle sensors:
Engine speed (RPM)
Speed (km/h or mph)
Coolant temperature
Fuel consumption and pressure
Mass air flow
Battery voltage
O2 sensor values
Fuel efficiency & drivability:
Monitors fuel consumption and shows ways to improve efficiency.
Analyzes drivability, e.g. braking and acceleration.