Circuit/System Verification

Ignition ON.
Verify DTC U0074 or U18A2 is not set or stored in history.
- If DTC U0074 or U18A2 is set or stored in history
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If DTC U0074 or U18A2 is not set or stored in history
Engine running.
Verify the scan tool Fuel Pressure Sensor parameter is between 0.2-4.8V.
- If not between 0.2-4.8V
  Refer to Circuit/System Testing.
- If between 0.2-4.8V
Verify the scan tool Fuel Pressure Sensor increases or decreases when commanding an increase and decrease in Fuel Pressure with a scan tool.
- If the parameter does not change
  Refer to Circuit/System Testing.
- If the parameter changes
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
  Refer to Circuit/System Testing.
- If the DTC does not set
All OK.