DTC P1235: High Pressure Fuel Pump Circuit; DTC P1236: High Pressure Fuel Pump No. 2 Circuit [11/2021 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
The fuel pump (for high pressure side) is attached to the insulator, which is attached to the cylinder head cover. The pump activates according to the position of the cam on the intake side camshaft (bank 1 and bank 2). The fuel pump (for high pressure side) increases the pressure of the fuel supplied from the fuel pump in the fuel tank to 2 to 18 MPa (20.4 to 183.5 kgf/cm2 , 290 to 580 psi) according to the operating condition, and it feeds the fuel to the fuel delivery pipe.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P1235 | High Pressure Fuel Pump Circuit | Open or short in fuel pump (for high pressure side of bank 1) circuit for 1 second or more (1 trip detection logic). |
|
Comes on | DTC stored |
| P1236 | High Pressure Fuel Pump No. 2 Circuit | Open or short in fuel pump (for high pressure side of bank 2) circuit for 1 second or more (1 trip detection logic). |
|
Comes on | DTC stored |