DTC P0190-15: Fuel Rail Pressure Sensor "A" Circuit Short to Battery or Open [08/2020 - 08/2021]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Fuel Pressure Sensor (for High Pressure Side))

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

Disconnect the fuel pressure sensor (for high pressure side) connector.
Turn the power switch on (IG).

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
F2-1 (VC) - F2-2 (E2)	Power switch on (IG)	4.75 to 5.25 V
F2-3 (PR) - F2-2 (E2)	Power switch on (IG)	3.0 to 5.25 V

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

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
F2-2 (E2) - Body ground	Power switch off	Below 1 Ω
F2-1 (VC) - F2-3 (PR)	Power switch off	171 to 189 kΩ

HINT:

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

Refer to INITIALIZATION [08/2020 - 08/2021]

Result

Proceed to
OK
NG

Result:

REPLACE FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE). Refer to REMOVAL [06/2018 - 08/2021]

Result:

See step 2

CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE) - ECM)

Disconnect the fuel pressure sensor (for high pressure side) connector.
Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
F2-3 (PR) - C88-97 (PR)	Always	Below 1 Ω
F2-2 (E2) - C88-96 (EPR)	Always	Below 1 Ω
F2-3 (PR) or C88-97 (PR) - Other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPLACE ECM. Refer to REMOVAL [08/2020 - 08/2021]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR