P0193

DTC P0190 Fuel Rail Pressure Sensor Circuit
DTC P0192 Fuel Rail Pressure Sensor Circuit Low Input
DTC P0193 Fuel Rail Pressure Sensor Circuit High Input

DESCRIPTION

DTC Detection Condition:

The fuel pressure sensor is installed on the delivery pipe. The sensor changes fuel pressure to an electrical signal and sends the signal to the ECM. Then the ECM controls the feedback of the pump discharge to maintain the fuel's target pressure between 4 and 13 MPa (40.8 and 132.6 kgf/cm, 2, 580 and 1,885 psi). If the sensor output stops, the ECM will stop the high pressure side fuel pump and supply fuel using the low pressure side fuel pump.

The fuel pressure sensor is installed on a fuel delivery pipe and detects the fuel pressure. It controls feedback of the pump discharge in order to keep the fuel within the target pressure range between 4 and 13 MPa (40.8 and 132.6 kgf/sq.cm, 580 and 1,885 psi) by the ECM.

HINT: After confirming DTC P0190, use the intelligent tester to confirm the fuel pressure in the delivery pipe by given menus DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / FUEL PRESS.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

These DTCs are set if the fuel pressure sensor output voltage is out of the standard range. The DTCs stand for an open or short malfunction of the sensor circuit.

If these DTCs are set, the ECM enters fail-safe mode and limits the engine power. Fail-safe mode continues until the engine switch is turned off.

Wiring Diagram:

Step 1:

Step 1(Continued)-3:

Step 4:

Step 5:

INSPECTION PROCEDURE

HINT:
- If different DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
- Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.