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

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 stalls.

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

CHECK DTC.
1. Turn the ignition switch to ON.
2. 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 P0506 displayed? (Current malfunction)

Yes: Go to 2.

No: Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
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) (H4DOTC)>AIR CLEANER ELEMENT .

No: Go to 3.
CHECK ELECTRONIC THROTTLE CONTROL.
1. Remove the electronic throttle control. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>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) (H4DOTC)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P2101 THROTTLE ACTUATOR "A" CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE .