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DTC P0087:00 [PCM (SKYACTIV-X)]

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Note

•  To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

Description	High fuel pressure sensor circuit range/performance problem
Detection condition	Determination conditions	•  If any of the following conditions is met under condition A or condition B: Condition A: ―  A condition in which the actual fuel pressure and the target fuel pressure vary for a continuous specified period of time even though the fuel pressure feedback amount is maintained high. Condition B: ―  The PCM detects that the actual fuel pressure is 5 MPa {51 kgf/cm2, 725 psi} or less continuously or intermittently.
	Preconditions	•  Engine speed: 500 rpm or more*1 •  The following DTCs are not detected: ―  High fuel pressure sensor: P0089:00, P0192:00 and P0193:00 ―  High pressure fuel pump: P0091:00 and P0092:00 *1: Standard can be verified by displaying PIDs using M-MDS
	Malfunction determination period	Condition A: •  Specified time Condition B: •  Specified time
	Drive cycle	•  1
	Self test type	•  CMDTC self test
	Sensor used	•  High fuel pressure sensor
Fail-safe function	•  Inhibits the SPCCI control with a large amount of intake air introduced (lean A/F).
Vehicle status when DTCs are output	•  Not applicable
Possible cause	•  Air suction in fuel line due to fuel is runout •  High pressure fuel pump connector or terminals malfunction •  High fuel pressure sensor connector or terminals malfunction •  PCM connector or terminals malfunction •  High fuel pressure sensor malfunction •  Fuel delivery system malfunction (insufficient fuel pressure) •  Fuel injector malfunction •  High pressure fuel pump malfunction ―  Relief valve (built-into high pressure fuel pump) malfunction •  PCM malfunction

System Wiring Diagram

Function Explanation (DTC Detection Outline)

Repeatability Verification Procedure

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Simulation item table

Function Inspection Using M-MDS

Step	Inspection	Results	Action
1	PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY •  Verify related Service Bulletins, on-line repair information, or Service Information availability. •  Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
2	PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA •  Is the DTC P0087:00 on freeze frame data?	Yes	Go to the next step.
		No	Go to the troubleshooting procedure for DTC on freeze frame data. (See DTC TABLE [PCM (SKYACTIV-X)].)
3	PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the freeze frame data/snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
4	PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY LACK OF FUEL •  Verify the snapshot data FLI. (See SNAPSHOT DATA TABLE [PCM (SKYACTIV-X)].) •  Is the snapshot data FLI 5% or less?	Yes	Refill the fuel. Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.
		No	Go to the next step.
5	PURPOSE: INSPECT FOR OTHER RELATED DTCs •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-X)].) Go to the next step.
		No	Go to the next step.
6	PURPOSE: VERIFY CONNECTOR CONNECTIONS •  Start the engine. •  Access the FUEL_PRES PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.) •  Does the PID value fluctuate when the following connectors are shaken? ―  High fuel pressure sensor ―  PCM	Yes	Repair or replace the applicable wiring harness or connector parts. Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.
		No	Go to the next step.
7	PURPOSE: VERIFY FUEL PRESSURE (LOW-SIDE) MALFUNCTION Note •  Verify the fuel pressure on the low pressure side with the operation of the high pressure fuel pump turned off. •  Bleed the remaining pressure in the fuel line using the following procedure. 1.  Switch the ignition off. 2.  Disconnect the high pressure fuel pump connector. 3.  Remove the fuel pump relay. (See RELAY LOCATION [(E)].) 4.  Start the engine and wait until the engine stalls. •  Switch the ignition off. •  Install the fuel pump relay. •  Switch the ignition ON (engine off). •  Display PID FUEL_PRES and simulation item FUEL_PUMP_REQ using the M-MDS. (See PID/DATA MONITOR INSPECTION.) (See SIMULATION INSPECTION.) •  Turn simulation item FUEL_PUMP_REQ on. •  Is the FUEL_PRES PID value 545—695 kPa {5.56—7.08 kgf/cm2, 79.1—100.0 psi}?	Yes	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 2.
		No	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

―  Inspect the fuel supply system (low pressure side).

―  Perform a unit inspection of the high fuel pressure sensor.

―  Verify that the primary malfunction is resolved and there are no other malfunctions.

Step	Inspection	Results	Action
1	PURPOSE: VERIFY IF MALFUNCTION RELATED TO FUEL PIPE (LOW PRESSURE SIDE) AFFECTS DIAGNOSTIC RESULTS •  Inspect the fuel pump unit. (See FUEL PUMP UNIT INSPECTION [SKYACTIV-X 2.0].) •  Is there any malfunction?	Yes	Replace the fuel pump unit and perform the repair completion verification. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		No	Inspect the fuel system pipes (low to high pressure sides) for fuel leakage and restriction. •  If there is any malfunction: ―  Repair or replace the malfunctioning location and perform the repair completion verification. •  If there is no malfunction: ―  Go to the next step.
2	PURPOSE: INSPECT HIGH FUEL PRESSURE SENSOR FOR MALFUNCTION •  Inspect the applicable part. (See HIGH FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-X 2.0].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See HIGH FUEL PRESSURE SENSOR/HIGH FUEL TEMPERATURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
Repair completion verification 1	PURPOSE: VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ―  Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		No	Go to the next step.
Repair completion verification 2	PURPOSE: VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.