DTC P0193
DTC P0193: Fuel Rail Pressure Sensor Circuit High Voltage
General Description
The fuel pressure sensor senses fuel pressure and converts it into electrical signals. The powertrain control module (PCM) adjusts to a specified fuel pressure by controlling the high pressure fuel pump solenoid based on the fuel pressure sensor output signal. The fuel pressure sensor outputs low signal voltage at low fuel pressure and high signal voltage at high fuel pressure. If the fuel pressure sensor output voltage is a specified voltage for a set time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 1.5 seconds or more |
| DTC Type | One drive cycle, MIL on |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | |
|---|---|
| Ignition switch or Engine start/stop button | Vehicle ON mode |
Malfunction Threshold
The fuel rail pressure sensor output voltage is 4.89 V or more for at least 1.5 seconds.
Possible Cause
- Fuel pressure sensor SG1 line open
- Fuel pressure sensor PF line open
- Fuel pressure sensor failure
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.