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.
DTC P0604-44: Internal Control Module Random Access Memory (RAM) Error Data Memory Failure [12/2024 - ]: Procedure
- CLEAR DTC
Result:
NEXT
See step 2
- CHECK DTC OUTPUT (DTC P0604-44)
- Read the DTCs.
Powertrain > Transmission > Trouble Codes
Result
Result Proceed to DTCs are not output A P0604-44 is output B
Result:
A
CHECK FOR INTERMITTENT PROBLEMS
Refer to METHOD TO SIMULATE PROBLEM SYMPTOMS [12/2024 - ]
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2024 - ]
Result:
B
REPLACE TCM
Refer to REMOVAL [12/2024 - ]
- Read the DTCs.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.