DTC Advanced Diagnostics: P0192, P0193
DTC P0192:Fuel Rail Pressure Sensor Circuit Low Voltage
DTC P0193:Fuel Rail Pressure Sensor Circuit High Voltage

General Description


The fuel rail 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 rail pressure sensor output signal. The fuel rail pressure sensor outputs low signal voltage at low fuel pressure and high signal voltage at high fuel pressure. If the fuel rail pressure sensor output voltage is out of a specified range for predetermined time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
1.5 seconds or more
DTC Type
One drive cycle, MIL on

Enable Conditions
Condition
 
Vehicle
ON mode

Malfunction Threshold
DTC: P0192

The fuel rail pressure sensor output voltage [FUEL PRESSURE CONVERTED FROM PF SENSOR] is 0.31 V or less for at least 1.5 seconds.

DTC: P0193

The fuel rail pressure sensor output voltage [FUEL PRESSURE CONVERTED FROM PF SENSOR] is 4.89 V or more for at least 1.5 seconds.

[ ]: HDS Parameter

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
DTC: P0192
Fuel rail pressure sensor VCC line open
Fuel rail pressure sensor PF line short to ground

DTC: P0193
Fuel rail pressure sensor SG line open
Fuel rail pressure sensor PF line open

Common
Fuel rail 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.