What must a technician use in order to diagnose problems in a gasoline injection system?

A technician typically uses a diagnostic scanner or code reader to retrieve trouble codes from the vehicle's onboard computer, which can indicate issues within the gasoline injection system. Additionally, they may employ a multimeter to check electrical components, fuel pressure gauges to assess fuel delivery, and oscilloscopes to analyze sensor signals. Visual inspection of the fuel injectors, wiring, and related components is also crucial for identifying potential malfunctions.