Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Subaru Forester XS, AutomaticFACTORY OEM SERVICE PROCEDURE
DTC P0604: Internal Control Module Random Access Memory (Ram) Error
DTC DETECTING CONDITION:
- Immediately at fault recognition
- GENERAL DESCRIPTION < Ref. to DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY (RAM) ERROR , Diagnostic Trouble Code (DTC) Detecting Criteria. >
TROUBLE SYMPTOM:
- Engine does not start.
- Engine stalls.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode < Ref. to
, OPERATION . > and Inspection Mode < Ref. to
, PROCEDURE Inspection Mode. >.
WIRING DIAGRAM:
DIAGNOSTIC PROCEDURE DTC P0604
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK ANY OTHER DTC ON DISPLAY. | Is any other DTC displayed? | Check the relevant DTC using the List of Diagnostic Trouble Code (DTC). < Ref. to , LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > | A temporary poor contact occurs. |
Factory Service Tools
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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.