DTC Diagnosis Procedure

1. Start the engine, and let the engine run at idle at least for 10 minutes.
2. Perform DTC confirmation procedure of DTC P0087.

Is 1st trip DTC detected?

YES

GO TO 2.

NO

GO TO 6.

Check low fuel pressure. Refer to Work Procedure .

Is inspection result normal?

YES

GO TO 3.

NO

Check low fuel pressure system. Refer to Diagnosis Procedure .

1. Turn ignition switch OFF.
2. Turn ignition switch ON.
3. Check the following value 30 minutes after turning the ignition switch ON.

   Low fuel pressure

   : 206 kPa (2.1 bar, 2.2 kgf/cm2, 30 psi) or more

Is inspection result normal?

YES

GO TO 4.

NO

Replace low pressure fuel pump. Refer to FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY : Exploded View .

Check high pressure fuel pump. Refer to Component Inspection .

Is inspection result normal?

YES

GO TO 5.

NO

Repair or replace the error-detected parts.

Check lifter. Refer to HIGH PRESSURE FUEL PUMP AND FUEL HOSE : Removal & Installation .

Does the lifter top surface have scratches and/or dents?

YES

Replace the error-detected parts.

NO

Check intermittent incident. Refer to Inspection .

1. Turn ignition switch OFF.
2. Connect fuel pressure gauge. Refer to Work Procedure .
3. Turn ignition switch ON.
4. Check the following value 30 minutes after turning the ignition switch ON.

   Low fuel pressure

   : 206 kPa (2.1 bar, 2.2 kgf/cm2, 30 psi) or more

Is inspection result normal?

YES

Check intermittent incident. Refer to Inspection .

NO

Replace low pressure fuel pump. Refer to FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY : Exploded View .