AutoCodes – Ford – P0603 2007 Ford Fusion

P0603 2007 Ford Fusion Code - ECM Keep Alive Memory Test Error

Quick Answer

Indicates the Powertrain Control Module (PCM) has experienced an internal memory concern. 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: P0603 2007 Ford Fusion indicates ECM Keep Alive Memory Test Error.
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.

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Code Popularity 2,669

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 Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0603 2007 Ford Fusion Description

Indicates the Powertrain Control Module (PCM) has experienced an internal memory concern. However, there are external items that can cause this DTC.

OBDII Code P0603 2007 Ford Fusion - ECM Keep Alive Memory Test Error - AutoCodes.com — P0603 2007 Ford Fusion Code - ECM Keep Alive Memory Test Error

What does this mean?

What are the Possible Causes of the DTC P0603 2007 Ford Fusion?

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 P0603 2007 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

Start by charging the vehicles battery and clean terminal, once the battery is charged and the terminals are clean and secure, erase code. If the code comes back ON you may have to reprogram or replaced ECM

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0603 2007 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 P0603 2007 Ford Fusion code?

Need more information on how to fix the P0603 2007 Ford Fusion code? Get Access to Factory Service Manuals

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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 P0603 2007 Ford Fusion Code

1. What does OBDII code P0603 mean for a 2007 Ford Fusion?

The code P0603 on a 2007 Ford Fusion indicates an ECM Keep Alive Memory Test Error, suggesting a malfunction in the Engine Control Module.

2. What are the common symptoms of P0603 on a 2007 Ford Fusion?

Common symptoms of P0603 include engine stalling, rough idling, poor acceleration, and in some cases, the vehicle may fail to start.

3. What are the possible causes of the ECM Keep Alive Memory Test Error on a 2007 Ford Fusion?

Common causes of P0603 in a 2007 Ford Fusion include a faulty ECM, loose electrical connections, a drained or weak battery, or a software glitch within the engine control module.

4. How can I diagnose the P0603 code on my 2007 Ford Fusion?

To diagnose the P0603 code, a professional mechanic or a DIY enthusiast with an OBDII scanner can scan the vehicle's computer system to retrieve the specific error code, allowing for further troubleshooting.

5. Can I still drive my 2007 Ford Fusion with the P0603 code present?

It is not recommended to drive your 2007 Ford Fusion with the P0603 code present, as it may lead to potential engine performance issues and could result in further damage if left unresolved.

6. How can I repair the ECM Keep Alive Memory Test Error on my 2007 Ford Fusion?

To repair the P0603 code, you may need to replace the faulty ECM, address any loose connections, ensure the battery is in good condition, or reprogram the engine control module if a software glitch is suspected.

7. Will resetting the ECM clear the P0603 code on a 2007 Ford Fusion?

Resetting the ECM may temporarily clear the P0603 code, but if the underlying issue causing the error code is not addressed, it is likely to reoccur once the vehicle is driven again.

8. Is the repair for the P0603 code on a 2007 Ford Fusion something I can do myself?

While basic troubleshooting like checking connections and the battery can be done by a DIY enthusiast, diagnosing and repairing the ECM Keep Alive Memory Test Error may require professional assistance due to the complexity of the engine control module.

9. How much can I expect to pay to repair the P0603 code on my 2007 Ford Fusion?

The cost of repairing the P0603 code on a 2007 Ford Fusion can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can the P0603 code on a 2007 Ford Fusion cause other problems if not fixed promptly?

If left unresolved, the P0603 code on a 2007 Ford Fusion can potentially lead to more severe engine issues, decreased fuel efficiency, and even permanent damage to the engine control module, making timely repair essential.