DTC P0604-44: Internal Control Module Random Access Memory (RAM) Error Data Memory Failure [12/2024 - ]: 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

Pre-procedure1

• Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
• Connect the cable to the negative (-) battery terminal.
• Turn the ignition switch to ON.
• Wait 16 seconds or more.

• Read the DTCs.

  Powertrain > Stop and Start > Trouble Codes 

  Result

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

Post-procedure1

• None.

Result: 

A 

USE SIMULATION METHOD TO CHECK 

Refer to HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS

Result: 

B 

REPLACE ENGINE STOP AND START ECU ASSEMBLY 

Refer to REMOVAL [12/2024 - ]