DTC P0507: Idle Control System Rpm - Higher Than Expected: Notes

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

Trouble symptom:

Engine keeps running at higher speed than specified idle speed.

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Clear Memory Mode>OPERATION , and inspection mode Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Inspection Mode>PROCEDURE .

CHECK DTC .
Read the engine DTC using the Subaru Select Monitor or general scan tool. Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Read Diagnostic Trouble Code (DTC) .

Is DTC other than P0507 displayed? (Current malfunction)

Yes: Check the appropriate DTC using the "List of Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>List of Diagnostic Trouble Code (DTC) .

No: Go to 2.
CHECK AIR INTAKE SYSTEM .
1. Start and idle the engine.
2. Check the following items.
  - Loose installation of intake manifold and throttle body
  - Cracks of intake manifold gasket and throttle body gasket
  - Disconnection of vacuum hoses
Is there any fault in air intake system?

Yes: Repair air suction and leaks.

No: Go to 3.
CHECK ELECTRONIC THROTTLE CONTROL .
1. Turn the ignition switch to OFF.
2. Remove the electronic throttle control. Ref. to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>Throttle Body>REMOVAL .
3. Check the electronic throttle control.
Are foreign matter found inside electronic throttle control?

Yes: Remove foreign matter from electronic throttle control.

No: Perform the DTC diagnosis. Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC P2101 THROTTLE ACTUATOR "A" CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE .