DTC    P0194    Fuel Rail Pressure Sensor Circuit Intermittent

for Preparation Click here


DESCRIPTION


P0194 
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Drive the vehicle with a stop-and-go city drive pattern for more than 15 minutes.
ECM internal error
(1 trip detection logic)
ECM

INSPECTION PROCEDURE

NOTICE:
When replacing the ECM, the ECM needs Registration and Initialization (Click here).

HINT:
  1. When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initializations/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.
  2. 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.

1.REPLACE ECM

  1. Replace the ECM (Click here).


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2.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off and wait for 30 seconds or more.

  1. Start the engine.

  1. Drive the vehicle with a stop-and-go city drive pattern for more than 15 minutes.

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

  1. Confirm that the DTC is not output again.

    HINT:
    Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.

    1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    2. Input DTC P0194.

    3. Check that STATUS is NORMAL. If STATUS is INCOMPLETE or UNKNOWN, repeat the confirmation driving pattern process.


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