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P0604 Severity
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
The engine control module (PCM) performs many vital functions in a modern vehicle, including management of the Fuel and Ignition Systems. When the PCM loses communication with one or more control modules it will set code P0604.
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OBD-II Code P0604 is defined as a Internal Control Module Random Access Memory (RAM) Error
The engine control module (PCM) performs many vital functions in a modern vehicle, including management of the Fuel and Ignition Systems. When the PCM loses communication with one or more control modules it will set code P0604.