Circuit description: Notes
The fuel pressure sensor, built into the delivery pipe, converts the fuel pressure into an electric signal and outputs it to the engine control computer. When the output from the fuel pressure sensor is cut off, the engine control computer stops the fuel pump ASSY (high-pressure side), and supplies fuel from the fuel pump (low-pressure side).
| DTC No. | DTC detection condition | Suspected parts |
|---|---|---|
| P0191 | When the condition where the fuel pressure sensor value was 2.38 kPa {243 kgf/cm2 , 3451 psi} or more continued for 2.5 seconds. (2-trip detection logic) |
|
NOTE:
After checking the DTC output, using the SSM4, read the fuel pressure on the [Data monitor] screen.