DTC P0190-15: Fuel Rail Pressure Sensor "A" Circuit Short to Battery or Open [08/2021 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 350, 2023 Lexus ES 350, 2022 Lexus ES 350, 2021 Lexus ES 350, and 2020 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE))
*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 engine switch on (IG).
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition D4-1 (VC) - D4-2 (E2) Engine switch on (IG) 4.75 to 5.25 V D4-3 (PR) - D4-2 (E2) Engine switch on (IG) 3.0 to 5.25 V - Turn the engine 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 D4-2 (E2) - Body ground Engine switch off Below 1 Ω D4-1 (VC) - D4-3 (PR) Engine switch off 171 to 189 kΩ HINT:
Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).
Refer to INITIALIZATION [07/2019 - ]
Result
Proceed to OK NG
Result:
OK
REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY LH (FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)). Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]
Result:
NG
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 D4-3 (PR) - C32-87 (PR) Always Below 1 Ω D4-2 (E2) - C32-133 (ETHW) Always Below 1 Ω D4-3 (PR) or C32-87 (PR) - Other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR