Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost to diagnose the P1093 Isuzu code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The Engine Control Module (ECM) monitors the Fuel Rail Pressure. The Diagnostic Trouble Code (DTC) will set when the ECM detects that the differential fuel rail pressure is -10 MPa (-1,450 psi) for longer than 15 seconds when the engine speed is between 0 – 900 RPM or The ECM detects that the deferential fuel rail pressure is -15 MPa (-2,170 psi) for longer than 15 seconds when the engine speed is higher than 1200 RPM.
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