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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls (Diagnostics) (H4DO) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0506 Idle Air Control System Rpm Lower Than Expected >> Trouble Symptom

DTC P0506 Idle Air Control System Rpm Lower Than Expected: Trouble Symptom

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode and Inspection Mode. Refer to OPERATION  and PROCEDURE .
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK FOR ANY OTHER DTC ON DISPLAY.  Is any other DTC displayed? Check the appropriate DTC using the "List of Diagnostic Trouble Code (DTC)". Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . Go to step .
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? Replace the air cleaner element. Refer to AIR CLEANER ELEMENT . Go to step .
3 CHECK ELECTRONIC THROTTLE CONTROL. 
  1. Remove the electronic throttle control. Refer to REMOVAL .
  2. Check the electronic throttle control.
Are foreign matter found inside electronic throttle control? Remove foreign matter from electronic throttle control. Perform the diagnosis of DTC P2101. Refer to DTC P2101 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE .