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

id0102t5146100

Outline

System malfunction location

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, 2901 psi} higher than the target fuel pressure for a continuous 5 s.

―  The following conditions continue for 2 s

•  Battery positive voltage: 8.0 V or more

•  Fuel pressure control: During execution

•  Change in target fuel pressure during half-rotation of crankshaft: -3—6 MPa{-30—61 kgf/cm², -435—870 psi}

•  Temperature: 8.85—70 °C {48.0—158.0 °F}

•  Target fuel discharge amount from supply pump: -10,000 mm³/rev or less

―  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

Fail-safe

•  PCM restricts fuel pressure. (high pressure side).

•  PCM restricts engine torque./Limits the maximum engine speed.

•  Inhibits the DENOx/DESOx control.

•  Inhibits the diesel particulate filter regeneration control.

•  Inhibits the EGR control.

•  Inhibits engine-stop by operating the i-stop function.

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

Connector diagram

•  Not applicable

System malfunction location	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, 2901 psi} higher than the target fuel pressure for a continuous 5 s. ― The following conditions continue for 2 s • Battery positive voltage: 8.0 V or more • Fuel pressure control: During execution • Change in target fuel pressure during half-rotation of crankshaft: -3—6 MPa{-30—61 kgf/cm², -435—870 psi} • Temperature: 8.85—70 °C {48.0—158.0 °F} • Target fuel discharge amount from supply pump: -10,000 mm³/rev or less ― 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
Fail-safe	• PCM restricts fuel pressure. (high pressure side). • PCM restricts engine torque./Limits the maximum engine speed. • Inhibits the DENOx/DESOx control. • Inhibits the diesel particulate filter regeneration control. • Inhibits the EGR control. • Inhibits engine-stop by operating the i-stop function.
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
Connector diagram	• Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

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.

2

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.

3

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-D)].)

No

Go to the next step.

4

INSPECT FUEL FILTER FOR MALFUNCTION

•  Inspect the applicable part.

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See FUEL FILTER BODY REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

5

INSPECT FUEL PRESSURE RELIEF VALVE FOR MALFUNCTION

•  Inspect the applicable part.
(See FUEL PRESSURE RELIEF VALVE INSPECTION [SKYACTIV-D 1.8].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See FUEL PRESSURE RELIEF VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

6

INSPECT FUEL SUCTION CONTROL VALVE FOR MALFUNCTION

•  Inspect the applicable part.
(See SUCTION CONTROL VALVE INSPECTION [SKYACTIV-D 1.8].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See SUCTION CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

7

INSPECT FUEL PRESSURE SENSOR FOR MALFUNCTION

•  Inspect the applicable part.
(See FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-D 1.8].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See FUEL PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

8

INSPECT FUEL PIPING FOR MALFUNCTION

•  Inspect the applicable part.
(See FUEL SYSTEM LOCATION INDEX [SKYACTIV-D 1.8].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

9

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 repair completion verification.

10

INSPECT SUPPLY PUMP FOR MALFUNCTION

•  Inspect the applicable part.
(See SUPPLY PUMP INSPECTION [SKYACTIV-D 1.8].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See SUPPLY PUMP REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

11

VERIFY IF MALFUNCTION IS CAUSED BY FUEL DETERIORATION

•  Replace the fuel.
(See FUEL DRAINING PROCEDURE [SKYACTIV-D 1.8].)

•  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC.
(See CLEARING 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}.
(See DTC INSPECTION)

•  Let the engine idle for 1 min.

•  Display the DTCs using the M-MDS.
(See DTC INSPECTION)

•  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 the next step.

Repair completion verification 1

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.

―  Race the engine to 5,000 rpm and hold for 5 s.

―  Release the accelerator pedal and idle the engine.

•  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-D 1.8].)

No

Go to the next step.

Repair completion verification 2

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.

Step	Inspection	Results	Action
1	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.
2	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.
2		No	Go to the next step.
3	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-D)].)
3		No	Go to the next step.
4	INSPECT FUEL FILTER FOR MALFUNCTION • Inspect the applicable part. • Is the part normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FUEL FILTER BODY REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
5	INSPECT FUEL PRESSURE RELIEF VALVE FOR MALFUNCTION • Inspect the applicable part. (See FUEL PRESSURE RELIEF VALVE INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FUEL PRESSURE RELIEF VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
6	INSPECT FUEL SUCTION CONTROL VALVE FOR MALFUNCTION • Inspect the applicable part. (See SUCTION CONTROL VALVE INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See SUCTION CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
7	INSPECT FUEL PRESSURE SENSOR FOR MALFUNCTION • Inspect the applicable part. (See FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FUEL PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
8	INSPECT FUEL PIPING FOR MALFUNCTION • Inspect the applicable part. (See FUEL SYSTEM LOCATION INDEX [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification.
9	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.
9		No	Repair or replace the malfunctioning location, then go to repair completion verification.
10	INSPECT SUPPLY PUMP FOR MALFUNCTION • Inspect the applicable part. (See SUPPLY PUMP INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
10		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See SUPPLY PUMP REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
11	VERIFY IF MALFUNCTION IS CAUSED BY FUEL DETERIORATION • Replace the fuel. (See FUEL DRAINING PROCEDURE [SKYACTIV-D 1.8].) • Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. (See CLEARING 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}. (See DTC INSPECTION) • Let the engine idle for 1 min. • Display the DTCs using the M-MDS. (See DTC INSPECTION) • Has DTC P0088:00 been recorded?	Yes	Go to the next step.
11		No	Advise the customer about the condition of the fuel they are using. Go to the next step.
Repair completion verification 1	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. ― Race the engine to 5,000 rpm and hold for 5 s. ― Release the accelerator pedal and idle the engine. • 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-D 1.8].)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	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.
Repair completion verification 2		No	DTC troubleshooting completed.