ECD SYSTEM (w/o EGR Cooler), Diagnostic DTC:P0191

DTC Code DTC Name
P0191 Fuel Rail Pressure Sensor Circuit Range / Performance

DESCRIPTION

Refer to DTC P0087 Click here.

DTC No. DTC Detection Condition Trouble Area
P0191

Voltage output of the fuel pressure sensor for the common rail is out of the standard range

(1 trip detection logic)

 Fuel pressure sensor

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

Tech Tips


  • If DTCs P0087, P0190, P0192, and P0193 are output simultaneously, the manifold absolute pressure sensor circuit may be open or short. Perform troubleshooting for those DTCs first.

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK OTHER DTC OUTPUT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester ON.

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Read the DTCs.

      Result
      Display (DTC output) Proceed to
      P0191 A
      P0191 and other DTCs B

      Tech Tips

      If codes other than P0191 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC CHART Click here

    A

    REPLACE COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR) Click here