AutoCodes – Ford – P0604 2008 Ford Fusion

P0604 2008 Ford Fusion Code - Internal Control Module Random Access Memory Error

Quick Answer

The Diagnostic Trouble Code (DTC) indicates the Powertrain Control Module (PCM) has experienced an internal memory fault. Common causes include Loose or poor battery terminal connection, Low battery charge, Powertrain Control Module (PCM) Programming. 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 2008 Ford Fusion indicates Internal Control Module Random Access Memory Error.
Common causes: Common causes include Loose or poor battery terminal connection, Low battery charge, Powertrain Control Module (PCM) Programming.
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.

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Code Popularity 2,161

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 21, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0604 2008 Ford Fusion Description

The Diagnostic Trouble Code (DTC) indicates the Powertrain Control Module (PCM) has experienced an internal memory fault. The PCM Random Access Memory (RAM) has been corrupted.

OBDII Code P0604 2008 Ford Fusion - Internal Control Module Random Access Memory Error - AutoCodes.com — P0604 2008 Ford Fusion Code - Internal Control Module Random Access Memory Error

What does this mean?

What are the Possible Causes of the DTC P0604 2008 Ford Fusion?

Loose or poor battery terminal connection
Low battery charge
Powertrain Control Module (PCM) Programming
Faulty Powertrain Control Module
Powertrain Control Module harness is open or shorted
Powertrain Control Module circuit poor electrical connection

How to Fix the DTC P0604 2008 Ford Fusion?

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.

What does this mean?

Code Tech Notes

Check the ECM 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0604 2008 Ford Fusion 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 2008 Ford Fusion code?

Need more information on how to fix the P0604 2008 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0604 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P0604 in a 2008 Ford Fusion?

- Common symptoms include the Check Engine Light illuminating, poor engine performance, stalling, or difficulty starting the vehicle.

2. What causes the Internal Control Module Random Access Memory Error (P0604) in a 2008 Ford Fusion?

- The P0604 code is typically triggered by a faulty powertrain control module (PCM), damaged wiring, or a software issue within the PCM.

3. How serious is the P0604 error code in a 2008 Ford Fusion?

- While the vehicle may still be drivable with the P0604 code, it is important to address the issue promptly to prevent further damage to the engine or other components.

4. Can I continue driving my 2008 Ford Fusion with the P0604 code present?

- It is not recommended to continue driving the vehicle with the P0604 code active, as it can lead to potential engine performance issues and may cause further damage.

5. How can I diagnose the P0604 code in my 2008 Ford Fusion?

- Proper diagnosis of the P0604 code requires a professional OBDII scanner to read the code, followed by thorough inspection of the PCM, wiring, and connections for any signs of damage.

6. What are some repair tips for fixing the P0604 code in a 2008 Ford Fusion?

- Repairing the P0604 code may involve reprogramming or replacing the PCM, repairing damaged wiring, or updating the software to resolve the random access memory error.

7. Can a DIY enthusiast fix the P0604 code in a 2008 Ford Fusion?

- While some experienced DIY enthusiasts may be able to address the P0604 code, it is recommended to seek professional help to ensure proper diagnosis and repair.

8. How much does it cost to repair the P0604 code in a 2008 Ford Fusion?

- The cost of repairing the P0604 code can vary depending on the extent of the issue, but it may range from $200 to $600, including parts and labor.

9. Will resetting the PCM clear the P0604 code in a 2008 Ford Fusion?

- Resetting the PCM may temporarily clear the P0604 code, but if the underlying issue is not addressed, the code is likely to reappear after some time.

10. How can I prevent the P0604 code from reoccurring in my 2008 Ford Fusion?

- To prevent the P0604 code from reoccurring, ensure regular maintenance of the vehicle, address any wiring issues promptly, and follow proper driving habits to avoid stressing the PCM.