ECD SYSTEM, Diagnostic DTC:P1273, P1274

DTC Code DTC Name
P1273 Learning Factor Too High
P1274 Learning Factor Too Low

DESCRIPTION

Refer to DTC P0090.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1273 Learning Factor Too High

When rail pressure regulating adaptation valve falls below minimum threshold.

(3 trip detection logic)

 Pressure discharge valve Does not come on DTC stored
P1274 Learning Factor Too Low

When rail pressure regulating adaptation valve exceeds maximum threshold.

(3 trip detection logic)

 Pressure discharge valve Does not come on DTC stored
Related Data List
DTC No. Data List

P1273

P1274

  • Rail Pressure Control Valve - Current Value from Rail Pressure Valve Control

  • Dutycycle Output of Rail Pressure Control Valve

WIRING DIAGRAM

Refer to DTC P0090.

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CAUTION / NOTICE / HINT

Note

After replacing the pressure discharge valve, the ECM needs initialization.

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Tech Tips

Read freeze frame data using the GTS. 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. REPLACE PRESSURE DISCHARGE VALVE ASSEMBLY


    1. Replace the pressure discharge valve assembly.

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    2. Perform the fuel PCV compensation value reset.

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      Result
      Proceed to
      NEXT

    NEXT

  2. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.


      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END