Immediately turn off the engine if the reading is too high.

• A. Fuel Pressure
• B. Oil Pressure
• C. RPM
• D. Engine Temperature

Answer: (A)

When a reading is too high, the immediate safety action is to shut the engine off. Fuel pressure controls how much fuel is delivered to the engine, and if it’s over the specified limit, components like the fuel rail, injectors, or lines can be damaged or fail, creating a serious fire or leakage risk. Turning off the engine stops the fuel pump, relieves pressure, and helps prevent further damage or ignition.

Oil pressure, while also important, is less likely to present an immediate high-risk shutdown scenario in typical diagnostics. Engine temperature and RPM relate to overheating or overspeed, but the scenario described points to the hazards of excessive fuel pressure, making shutoff the most appropriate first step.