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HOMESERVICE MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (2.0L (EXCEPT FOR HEV)) (DIAGNOSTICS) (2 OF 4)DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC P0506: IDLE CONTROL SYSTEM RPM - LOWER THAN EXPECTEDNOTES
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans

DTC P0506: Idle Control System Rpm - Lower Than Expected: Notes

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Notes
  1. - 

    DTC detecting condition: 

    Detected when two consecutive driving cycles with fault occur.

    Trouble symptom: 

    • Hard to start the engine.
    • Engine does not start
    • Improper idling
    • Engine stall
    NOTE:

    After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to  ENGINE (DIAGNOSTICS) (H4DO 2.0 (EXCEPT FOR HEV))>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE  . 

  1. CHECK DTC  .

    Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC other than P0506 displayed? (Current malfunction)

    Yes:  Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.0 (EXCEPT FOR HEV))>DIAGNOSTIC TROUBLE CODE (DTC) .

    No:  Go to  2.

  2. CHECK AIR CLEANER ELEMENT  .
    1. Turn the ignition switch to OFF.
    2. Check the air cleaner element.

    Is there excessive clogging on air cleaner element?

    Yes:  Replace the air cleaner element. Ref. to INTAKE (INDUCTION) (H4DO (EXCEPT FOR HEV))>AIR CLEANER ELEMENT .

    No:  Go to  3.

  3. CHECK ELECTRONIC THROTTLE CONTROL  .
    1. Remove the electronic throttle control. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (EXCEPT FOR HEV))>THROTTLE BODY>REMOVAL .
    2. Check the electronic throttle control.

    Are foreign matter found inside electronic throttle control?

    Yes:  Remove foreign matter from electronic throttle control.

    No:  Perform the diagnosis of DTC P2101. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.0 (EXCEPT FOR HEV))>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P2101: THROTTLE ACTUATOR "A" CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.