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Home >> Subaru >> 2015 >> WRX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 176 (Continuously Variable Transaxle (CVT) (Diagnostics)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0604 Internal Control Module Random Access Memory (Ram) Error >> Trouble Symptom

DTC P0604 Internal Control Module Random Access Memory (Ram) Error: Trouble Symptom

WARNING: This page is about a different car, the 2016 Subaru Outback and 2016 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

TCM RAM malfunction

DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK DTC. 
  1. Perform the Clear Memory Mode using the Subaru Select Monitor. < Ref. to CLEAR MEMORY MODE . >
  2. Read the DTC.
 Is DTC P0604 displayed? Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . > < Ref. to TRANSMISSION CONTROL MODULE (TCM) . > Current condition is normal. Check for interference from noise, etc.
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