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

id0102j5146100

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 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

•  Temperature: 8.85—70 °C

•  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.

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

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 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 • Temperature: 8.85—70 °C • 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.
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.
(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)])

•  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.
(See FUEL PRESSURE RELIEF VALVE INSPECTION [SKYACTIV-D 2.2])

•  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.
(See SUCTION CONTROL VALVE INSPECTION [SKYACTIV-D 2.2])

•  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.
(See FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-D 2.2]

•  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.
(See SUPPLY PUMP INSPECTION [SKYACTIV-D 2.2]

•  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.
(See FUEL DRAINING PROCEDURE [SKYACTIV-D 2.2])

•  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC.
(See CLEARING DTC [PCM (SKYACTIV-D 2.2)])

•  Start the engine and idle it.

•  Using the M-MDS, display the data monitor item ECT and warm up the engine to 80 °C.
(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)])

•  Let the engine idle for 1 min.

•  Display the DTCs using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)])

•  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 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.
(See CLEARING DTC [PCM (SKYACTIV-D 2.2)])

•  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.
(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)])

•  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.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2])

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.

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. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) • 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)])
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.
3		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. (See FUEL PRESSURE RELIEF VALVE INSPECTION [SKYACTIV-D 2.2]) • Is the fuel pressure relief valve normal?	Yes	Go to the next step.
4		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. (See SUCTION CONTROL VALVE INSPECTION [SKYACTIV-D 2.2]) • Is the suction control valve normal?	Yes	Go to the next step.
5		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. (See FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-D 2.2] • Is the fuel pressure sensor normal?	Yes	Go to the next step.
6		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.
7		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.
8		No	Repair or replace the malfunctioning location, then go to Step 11.
9	INSPECT SUPPLY PUMP • Inspect the supply pump. (See SUPPLY PUMP INSPECTION [SKYACTIV-D 2.2] • Is the supply pump normal?	Yes	Go to the next step.
9		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. (See FUEL DRAINING PROCEDURE [SKYACTIV-D 2.2]) • Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)]) • Start the engine and idle it. • Using the M-MDS, display the data monitor item ECT and warm up the engine to 80 °C. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) • Let the engine idle for 1 min. • Display the DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) • Has DTC P0088:00 been recorded?	Yes	Go to the next step.
10		No	Advise the customer about the condition of the fuel they are using. Go 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. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)]) • 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. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) • 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. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2])
11		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)])
12		No	DTC troubleshooting completed.