P008800

DTC Code	DTC Name
P008800	Fuel Rail / System Pressure - Too High

DESCRIPTION

Refer to DTC P008700.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P008800	Fuel Rail / System Pressure - Too High	Although the ECM is requesting fuel pump assembly (for high pressure side) to open the spill control valve, fuel pressure increases 3 MPa (30.6 kgf/cm², 435 psi) from target pressure for about 6 seconds (1 trip detection logic).	Fuel pump assembly (for high pressure side) Fuel pressure sensor (for high pressure side) ECM	Comes on	DTC stored	SAE: P0088

MONITOR DESCRIPTION

If the fuel pressure increases despite a decrease request signal being sent to the fuel pump assembly (for high pressure side) by the ECM, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Required Sensors/Components	Fuel pressure sensor (for high pressure side)
Frequency of Operation	Continuous

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Record the Freeze Frame Data.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG) and turn the GTS on.
Put the engine in Inspection Mode (2WD for measuring Exhaust Gas).

Click here
Start the engine.
Based on engine speed, engine load and other freeze frame data stored in the ECM, reproduce the conditions present when the DTC was stored.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read the pending DTCs.
Tech Tips
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P008800.

Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

Tech Tips

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.

CAUTION / NOTICE / HINT

Note

Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

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(Select Powertrain in Health Check and then check the time stamp data.)

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If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

Click here

Tech Tips

Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P008800)

Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
DTC P008800 is output	A
DTC P008800 and other DTCs are output	B

Tech Tips

If any DTCs other than P008800 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART Click here

A

CHECK FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)

Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Put the engine in Inspection Mode (2WD for measuring Exhaust Gas).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode
Start the engine.
Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (High).

Powertrain > Engine > Data List

Tester Display

Fuel Pressure (High)

Tester Display
Inspection Mode

Tester Display
Fuel Pressure (High)

According to the display on the GTS, read the Data List while racing the engine.

OK
Fuel pressure fluctuates.

Result

Proceed to
OK
NG

Tech Tips

Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).

Click here

NG

REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY LH (FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)) Click here

OK

REPLACE FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE)

Replace the fuel pump assembly (for high pressure side).

Click here

Tech Tips

Perform "Inspection After Repair" after replacing the fuel pump assembly (for high pressure side).

Click here

Result

Proceed to
NEXT

CLEAR DTC

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs

Turn the power switch off and wait for at least 30 seconds.

Result

Proceed to
NEXT

CHECK IF DTC OUTPUT RECURS (SEE IF DTC P008800 IS OUTPUT AGAIN)

Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
DTC P008800 is output	A
DTCs are not output	B

A

REPLACE ECM Click here

B

END

SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P008800