DTC P0088:00 [PCM (SKYACTIV-D 2.2)]

id0102j5146100


Engine Type

Item

Reference
Without SCR System
(See Without SCR System.)
With SCR System
(See With SCR System.)


Without SCR System

DTC P0088:00

High fuel pressure malfunction in common rail fuel pressure control system
DETECTION CONDITION
•  With the following conditions met, a condition has continued for 20 s in which the fuel pressure sensor output value is higher than the fuel pressure control target value by 20 MPa {204 kgf/cm2, 2,901 psi}:
―  The following conditions continue for 2 s:
•  Battery voltage: 8 V or more
•  Fuel pressure control: Being performed
•  Change in target fuel pressure during half-rotation of crankshaft: −3 to 3 MPa {−30—30 kgf/cm2, −435—435 psi}
•  Fuel temperature: −25—75 °C {−13—167 °F}
•  Target fuel discharge amount from supply pump: Less than 10,000 mm3/rev
―  The following DTCs are not detected:
•  Fuel temperature sensor: P0181:00, P0182:00, P0183:00
•  Fuel pressure sensor: P0191:00, P0192:00, P0193:00
•  Suction control valve: P062A:00
Diagnostic support note
•  This is an intermittent monitor (fuel system).
•  The check engine light illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
•  PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
•  FREEZE FRAME DATA/Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Inhibits the auto diesel particulate filter regeneration control.
•  Inhibits the compulsory diesel particulate filter regeneration control.
•  Inhibits the EGR control.
•  PCM restricts engine-transaxle integration control. (ATX)
•  Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE
•  Fuel filter clogged
•  Fuel pressure relief valve malfunction
•  Suction control valve malfunction
•  Fuel pressure sensor malfunction
•  Fuel pipe perforation or breakage (improper connection)
•  Fuel leakage from fuel line or clogging
•  Supply pump malfunction
•  Poor fuel quality
•  PCM malfunction
SYSTEM WIRING DIAGRAM
Not applicable

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (fuel system related) on the repair order.
—
Go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition off, then ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Are any other PENDING CODEs and/or DTCs present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
No
Go to the next step.
4
INSPECT FUEL FILTER
•  Inspect the fuel filter for clogging.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 12.
(See FUEL FILTER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See FUEL FILTER DISASSEMBLY/ASSEMBLY [SKYACTIV-D 2.2].)
No
Go to the next step.
5
INSPECT FUEL PRESSURE RELIEF VALVE
•  Inspect the fuel pressure relief valve.
•  Is there any malfunction?
Yes
Replace the common rail, then go to the next step.
(See COMMON RAIL REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
6
INSPECT SUCTION CONTROL VALVE
•  Inspect the suction control valve.
•  Is there any malfunction?
Yes
Replace the suction control valve, then go to Step 12.
(See SUCTION CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
7
INSPECT FUEL PRESSURE SENSOR
•  Inspect the fuel pressure sensor.
•  Is there any malfunction?
Yes
Replace the common rail, then go to Step 12.
(See COMMON RAIL REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
8
INSPECT FUEL PIPE
•  Inspect the fuel pipe installation condition.
•  Is there any malfunction?
Yes
Install the fuel pipe properly, then go to Step 12.
No
Go to the next step.
9
INSPECT FOR FUEL LEAKAGE FROM FUEL LINE OR CLOGGING
•  Inspect the following fuel line for fuel leakage or clogging.
―  Between supply pump and common rail
―  Between common rail and fuel injector
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 12.
No
Go to the next step.
10
INSPECT SUPPLY PUMP
•  Inspect the supply pump.
•  Is there any malfunction?
Yes
Replace the supply pump, then go to Step 12.
(See SUPPLY PUMP REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
11
INSPECT FOR MALFUNCTION DUE TO POOR FUEL
•  Replace the fuel.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and idle it.
•  Wait until the ECT PID value is above 80 °C {176 °F}.
•  Wait for 1 min (idle).
•  Perform the Pending Trouble Code Access Procedure.
•  Is the PENDING CODE for this DTC present?
Yes
Go to the next step.
No
Advise the customer as to the change in the fuel used.
Go to Step 13.
12
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and idle it.
•  Wait until the ECT PID value is above 80 °C {176 °F}.
•  Wait for 1 min (idle).
•  Perform the DTC Reading Procedure.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
13
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
No
DTC troubleshooting completed.


With SCR System

DTC P0088:00

High fuel pressure malfunction in common rail fuel pressure control system
DETECTION CONDITION
•  With the following conditions met, the actual fuel pressure is 20 MPa {204 kgf/cm2, 2,901 psi} higher than the target fuel pressure for a continuous 5 s.
―  The following conditions continue for 5 s
•  Battery positive voltage: 8.0 V or more
•  Fuel pressure control: During execution
•  Change in target fuel pressure during half-rotation of crankshaft: -9—9 MPa {−92—92 kgf/cm2, −1,305—1,305 psi}
•  Temperature: 8.85—70 °C {47.9—158 °F}
•  Target fuel discharge amount from supply pump: -10,000 mm3/rev
―  The following DTCs are not detected
•  Suction control valve: P0628:00, P0629:00
•  Common rail fuel pressure control system: P0089:00
•  Fuel pressure relief valve control system: P009B:00, P009C:00, P009D:00
•  Constant voltage power supply control system: P0652:00, P0653:00
•  Fuel pressure sensor: P01C6:00, P01C5:00, P018D:00, P018C:00, P10CD:00
•  Fuel temperature sensor: P10D5:00
•  LIN communication system: U1201:00, U1202:00, U1203:00, U1204:00
Diagnostic support note
•  This is an intermittent monitor (fuel system).
•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA/Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Limits the engine torque/limits the maximum engine speed.
•  Inhibits the automatic diesel particulate filter regeneration control.
•  Inhibits the manual diesel particulate filter regeneration control.
•  Inhibits engine-stop by i-stop control.
•  Inhibits the EGR control.
•  Limits the fuel pressure. (High pressure)
POSSIBLE CAUSE
•  Fuel filter clogging
•  Fuel pressure relief valve malfunction
•  Suction control valve malfunction
•  Fuel pressure sensor malfunction
•  Erroneous piping (poor connection) of fuel pipe
•  Fuel leakage or clogging in fuel line
•  Supply pump malfunction
•  Inferior fuel added
•  PCM malfunction
SYSTEM WIRING DIAGRAM
Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action
1
RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the freeze frame data/snap shot data.
—
Go to the next step.
2
VERIFY OTHER RELATED DTCs
•  Switch the ignition OFF, and then switch it ON (engine off).
•  Display the DTCs using the M-MDS.
•  Has any DTC other than P0088:00 been stored?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
No
Go to the next step.
3
INSPECT FUEL FILTER
•  Inspect the fuel filter for clogging.
•  Is the fuel filter normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location, then go to Step 11.
(See FUEL FILTER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
4
INSPECT FUEL PRESSURE RELIEF VALVE
•  Inspect the fuel pressure relief valve.
•  Is the fuel pressure relief valve normal?
Yes
Go to the next step.
No
Replace the common rail, then go to Step 11.
(See COMMON RAIL REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
5
INSPECT SUCTION CONTROL VALVE
•  Inspect the suction control valve.
•  Is the suction control valve normal?
Yes
Go to the next step.
No
Replace the suction control valve, then go to Step 11.
(See SUCTION CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
6
INSPECT FUEL PRESSURE SENSOR
•  Inspect the fuel pressure sensor.
•  Is the fuel pressure sensor normal?
Yes
Go to the next step.
No
Replace the fuel pressure sensor, then go to Step 11.
(See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
7
INSPECT FUEL PIPING
•  Inspect the fuel piping.
•  Is the fuel piping installation normal?
Yes
Go to the next step.
No
Install the fuel piping correctly, then go to Step 11.
8
INSPECT FUEL LINE FOR FUEL LEAKAGE OR CLOGGING
•  Inspect the following fuel lines of each cylinder for fuel leakage or clogging.
―  Supply pump to common rail
―  Common rail to fuel injector
•  Is the fuel line normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location, then go to Step 11.
9
INSPECT SUPPLY PUMP
•  Inspect the supply pump.
•  Is the supply pump normal?
Yes
Go to the next step.
No
Replace the supply pump, then go to Step 11.
(See SUPPLY PUMP REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
10
VERIFY IF MALFUNCTION IS CAUSED BY FUEL DETERIORATION
•  Replace the fuel.
•  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC.
•  Start the engine and idle it.
•  Using the M-MDS, display the data monitor item ECT and warm up the engine to 80 °C {176 °F}.
•  Let the engine idle for 1 min.
•  Display the DTCs using the M-MDS.
•  Has DTC P0088:00 been recorded?
Yes
Go to the next step.
No
Advise the customer about the condition of the fuel they are using.
Go to to Step 12.
11
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Reconnect all disconnected connectors and hoses.
•  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC.
•  Race the engine to 5,000 rpm and maintain for 5 s.
•  Release the accelerator pedal and idle the engine.
•  Display the DTCs using the M-MDS.
•  Has DTC P0088:00 been recorded?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM, then go to the next step.
No
Go to the next step.
12
VERIFY OTHER DTCs
•  Has any other DTC or pending code been stored?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-D 2.2)])
No
DTC troubleshooting completed.