DTC P0088-00: Fuel Rail / System Pressure - Too High [10/2018 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P008800)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream 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

HINT:

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

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 10/2019] Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2019 - 10/2020] Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2020 - 08/2021] Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2021 - ]

Result:

See step 2

INSPECT FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.

Put the engine in Inspection Mode (Maintenance Mode).

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)

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

Fuel pressure fluctuates.

Result

Proceed to
OK
NG

HINT:

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

Refer to INITIALIZATION [10/2018 - 08/2021] Refer to INITIALIZATION [08/2021 - ]

Result:

REPLACE FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE). Refer to REMOVAL [10/2018 - 07/2022] Refer to REMOVAL [07/2022 - ]

Result:

See step 3

REPLACE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE)

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

Refer to REMOVAL [10/2018 - 07/2022] Refer to REMOVAL [07/2022 - ]

HINT:

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

Refer to INITIALIZATION [10/2018 - 08/2021] Refer to INITIALIZATION [08/2021 - ]

Result

Proceed to
NEXT

Result:

See step 4

CLEAR DTC

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs.
Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

Result:

See step 5

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

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

Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

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

Result:

END

Result:

REPLACE ECM. Refer to REMOVAL [10/2018 - 07/2022] Refer to REMOVAL [07/2022 - ]