P0604 Code - Internal Control Module Random Access Memory Error
Quick Answer
The Engine Control Module (ECM) / Powertrain Control Module (PCM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. Common causes include Loose or poor battery terminal connection, Low battery charge, Engine Control Module (ECM) / Powertrain Control Module (PCM) power supply circuit is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0604 indicates Internal Control Module Random Access Memory Error.
- Common causes
- Common causes include Loose or poor battery terminal connection, Low battery charge, Engine Control Module (ECM) / Powertrain Control Module (PCM) power supply circuit is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0604 Description
What are the Possible Causes of the DTC P0604?
- Loose or poor battery terminal connection
- Low battery charge
- Engine Control Module (ECM) / Powertrain Control Module (PCM) power supply circuit is open or shorted
- ECM/PCM Programing
- Faulty ECM/PCM
How to Fix the DTC P0604?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0604 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P0604 BMW — ECM Self Check Fault
- P0604 Buick — Control Module Random Access Memory Performance
- P0604 Cadillac — Control Module Random Access Memory Performance
- P0604 Chevrolet — Control Module Random Access Memory Performance
- P0604 Ford — Internal Control Module Random Access Memory Error
- P0604 GMC — Control Module Random Access Memory Performance
- P0604 Infiniti — Engine Control Module Internal Random Access Memory Error
- P0604 Isuzu — Internal Processor Error
- P0604 KIA — Internal Control Module Random Access Memory Error
- P0604 Lexus — ECM Random Access Memory Error
- P0604 Mazda — ECM RAM error
- P0604 Mercedes-Benz — Internal Control Module Random Access Memory Error
- P0604 MINI — ECM Self Check Fault
- P0604 Mitsubishi — Internal Control Module RAM
- P0604 Nissan — Engine Control Module Internal Random Access Memory Error
- P0604 Pontiac — Control Module Random Access Memory
- P0604 Saab — Control Module Random Access Memory
- P0604 Saturn — Control Module Random Access Memory
- P0604 Scion — ECM Random Access Memory Error
- P0604 Subaru — Internal Control Module Random Access Memory Error
- P0604 Toyota — ECM Random Access Memory Error
- P0604 Volkswagen — Internal Control Module Random Access Memory Error
- P0604 Volvo — Internal Control Module Random Access Memory Error
Frequently Asked Questions about P0604 Code
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