Engine-Codes.com | All About OBDII Engine Codes
Engine-Codes.com | All About OBDII Engine Codes

P0604

P0604 - Internal Control Module Random Access Memory Error

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P0604 Comments |  Add Comment
Possible causes
- Loose or poor battery terminal connection
- Low battery charge
- ECM power supply circuit is open or shorted
- ECM Programing
- Faulty ECM
Help with Possible causes What does this mean?
Tech notes
Check the ECM/PCM fuse, if fuse is OK try erasing the code first and if the code comes back you may have to reprogram or replaced the ECM/PCM.
Help with Tech Notes What does this mean?
When is the code detected?
Indicates the ECM has experienced an internal memory fault.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine may not start
P0604 Description

The ECM continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the will ECM will set the code and illuminate the engine light.

P0604 Information for specific makes
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