What does code P0604 mean?

Internal Control Module Random Access Memory (RAM) Error: The ECM RAM has a fault — module may need replacement.

P0604 is rated as high severity. Address soon — may cause further damage.

P0604

Internal Control Module Random Access Memory (RAM) Error

Powertrain Code · High

What does P0604 mean?

The ECM RAM has a fault — module may need replacement.

System: ECU

P0604 is a powertrain diagnostic trouble code indicating internal control module random access memory (ram) error. This code is classified as high severity, which means: address soon — may cause further damage.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.