What is the P0604 fault number? What is Internal Control Module Random Access Memory Error (RAM)? How can you fix P0604 fault codes? What are the causes and symptoms of the P0604 error code?
What is the P0604 fault code? What does it signify?
The powertrain control module of your car (PCM), contains two main types memory. The first, read-only memory, is fixed. “ROM” The former is volatile and is also known as random access memory “RAM” . The default programming of the PCM includes vital engine management information. It is difficult to find all the information in the PCM once engine management has started. There is so much information stored in the PCM. RAM stores a limited amount of data which allows the PCM respond faster to repeated and rapid situations.
PCM employs adaptive strategies for key functions, such as engine and automatic transmission operation. It stores the most important information in its KAM memory (Keep Alive Memory), which can perform “live” calculations even when the engine is off.
Regular testing of both the ROM AND RAM sections of the memory is done by the PCM to ensure that the live memory does its job correctly. It monitors both the internal and external memory as well as circuits and outgoing signals. It will store the P0604 code if it discovers an error in the RAM functionality, or detects an incompatibility.
What causes the P0604 Fault code?
- – Defective PCM fuse
- – A defective battery terminal connection
- Low battery voltage
- Problems with the power cable for PCM
- – Programming the PCM with more up-to date software
- – Defective PCM
What are the symptoms of P0604 Malfunction code?
- – Illumination at the check engine lights
- – ABS (Anti Lock Braking System) and TCS (Traction Control System), malfunction lights are on
- Engine not running
- Engine stalling
- – Idle irregularity
- – Gear shifting problems
- – Different driving problems
- – Increased fuel consumption
You may not feel any symptoms in rare cases other than the check-engine light coming on.
How to Fix the P0604 Fault Code
It’s easy to lose the game of cat-and-mouse when you try to resolve fault code P0604. Clearing the code and reprogramming your PCM can solve the problem. It is important to first check for other fault codes. Your mechanic should first address any other codes. If the code does not appear to be affecting itself, your mechanic should clear it and reset the PCM (by disengaging the negative battery cable, waiting a few moments, and then a test drive). The code may not return if there is a problem with the battery connection. All wires connected to the PCM must be visually checked and cleaned if the code does not return. Damaged wires and connections should also be repaired. Check for special fuses to the PCM.
- Repair or retightening the battery terminals
- – Open or Short Circuit in CAN Wiring Harness
- – Replacements of associated fuse
- – Relay to stop defective power supply for PCM
- Repair of damaged cables from and to the PCM
- – PCM programming error
- – Replacing your PCM
How Serious Is the P0604 Fault Code
General Motors, BMW, and Volkswagen models often have the P0604 fault codes. A P0604 fault code can be stored in the PCM. This code is usually not too serious. The fault can be corrected by straightening the wiring and clearing the code. A fault code that is linked to another control module can cause serious problems. This can cause serious damage to the engine and transmission management. This should be done immediately.
