P0604 Mitsubishi Code - Internal Control Module RAM
Quick Answer
The ECM 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, ECM 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 Mitsubishi indicates Internal Control Module RAM.
- Common causes
- Common causes include Loose or poor battery terminal connection, Low battery charge, ECM 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 Mitsubishi Description
What are the Possible Causes of the DTC P0604 Mitsubishi?
- Loose or poor battery terminal connection
- Low battery charge
- ECM power supply circuit is open or shorted
- ECM Programing
- Faulty ECM
How to Fix the DTC P0604 Mitsubishi?
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 Mitsubishi 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.
Need more information about the P0604 Mitsubishi code?
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Frequently Asked Questions about P0604 Mitsubishi Code
1. What does the OBD-II code P0604 mean on a Mitsubishi?
P0604 indicates an issue with the Internal Control Module Random Access Memory (RAM), which could disrupt the vehicle’s engine control functions.
2. What are the common symptoms of code P0604 on a Mitsubishi?
Symptoms may include engine stalling, poor fuel economy, difficulty starting, reduced performance, or the check engine light being illuminated.
3. What causes the P0604 code to appear in a Mitsubishi?
Common causes include a faulty Engine Control Module (ECM), software corruption, electrical shorts, damaged wiring, or low battery voltage.
4. Can I drive my Mitsubishi with a P0604 code?
It’s not recommended to drive long distances with this code, as it can lead to unpredictable engine behavior and potential safety risks.
5. How is the P0604 code diagnosed in a Mitsubishi?
A mechanic will use a scan tool to check for related codes, inspect the ECM, test the battery and electrical connections, and verify wiring integrity.
6. Can the P0604 code be fixed without replacing the ECM on a Mitsubishi?
In some cases, it can be resolved by repairing wiring issues, clearing software glitches, or addressing battery and voltage problems.
7. How much does it cost to repair the P0604 code on a Mitsubishi?
Repair costs vary depending on the cause, but ECM replacement can range from $500 to $1,500, plus diagnostic and labor fees.
8. Can a weak battery trigger the P0604 code in a Mitsubishi?
Yes, a weak battery or inconsistent voltage can affect the ECM’s RAM function and trigger the code.
9. Is the P0604 code specific to Mitsubishi vehicles?
No, P0604 is a generic OBD-II code that can appear in various makes and models but may have vehicle-specific diagnostic and repair procedures.
10. Do I need to reprogram the ECM after fixing the P0604 code in a Mitsubishi?
If the ECM is replaced or software corruption is addressed, reprogramming may be required to ensure proper operation.
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