DTC P0604: Internal Control Module Random Access Memory (RAM) Error: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTC.
5. Turn the engine switch off.
6. Disconnect the battery negative terminal and wait for 1 minute.
7. Connect the battery negative terminal.
8. Turn the engine switch on (IG).
9. Enter the following menus: Powertrain / Engine / Trouble Code.
10. Read the DTCs.

    Result

    Display (DTC output)	Proceed to
    P0604	A
    No output DTC	B

B → CHECK FOR INTERMITTENT PROBLEMS 

A → See step   2