Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0604-00Internal Control Module Random Access Memory Ram Error
P0604Internal control Module RAM Error
P0604INTERNAL CONTROL MODULE RAM ERROR
Manufacturer communications
51Original wording in English
BUICK, CADILLAC, CHEVROLET, GMC
This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.
JEEP
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **U0405-00 - Invalid Data Received From Cruise Control Module. ● U0104-00 - Lost Communication With Cru…
BUICK, CADILLAC, CHEVROLET, GMC
This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.
JEEP
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. (In Active or Stored sta…
Check vehicle applicability
767A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A6 ↗ | 2025 |
| Audi | A6 ↗ | 2024 |
| Audi | A6 ALLROAD ↗ | 2025 |
| Audi | A6 ALLROAD ↗ | 2024 |
| Audi | A7 ↗ | 2025 |
| Audi | A7 ↗ | 2024 |
| Audi | A8 ↗ | 2025 |
| Audi | A8 ↗ | 2024 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Internal Control Module RAM Error
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.