DTC P0604-44: Internal Control Module Random Access Memory (RAM) Error Data Memory Failure [10/2023 - ]: Procedure

1. Clear the DTCs.

   Powertrain > Stop and Start > Clear DTCs 

2. Turn the ignition switch off.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
2. Connect the cable to the negative (-) battery terminal.
3. Turn the ignition switch to ON.
4. Wait 16 seconds or more.
5. Read the DTCs.

   Powertrain > Stop and Start > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTC P0604-44 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ] 

Result: 

B 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [12/2021 - ]