AutoCodes – Nissan – P0603 2010 Nissan Pathfinder

P0603 2010 Nissan Pathfinder Code - Engine Control Module Power Supply Circuit

Quick Answer

Battery voltage is supplied to the Engine Control Module (ECM) even when the ignition switch is turned OFF for the ECM memory function of the DTC memory, the air-fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. Common causes include Loose or poor battery terminal connection, Low battery charge, Faulty Engine Control Module (ECM). 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 2010 Nissan Pathfinder indicates Engine Control Module Power Supply Circuit.
Common causes: Common causes include Loose or poor battery terminal connection, Low battery charge, Faulty Engine Control Module (ECM).
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 3,035

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 2010 Nissan Pathfinder Description

OBDII Code P0603 2010 Nissan Pathfinder - Engine Control Module Power Supply Circuit - AutoCodes.com — P0603 2010 Nissan Pathfinder Code - Engine Control Module Power Supply Circuit

What does this mean?

What are the Possible Causes of the DTC P0603 2010 Nissan Pathfinder?

Loose or poor battery terminal connection
Low battery charge
Faulty Engine Control Module (ECM)
ECM power supply circuit is open or shorted
ECM Outdated Program

How to Fix the DTC P0603 2010 Nissan Pathfinder?

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 2010 Nissan Pathfinder 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 2010 Nissan Pathfinder code?

Need more information on how to fix the P0603 2010 Nissan Pathfinder 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 2010 Nissan Pathfinder Code

1. What does the OBDII code P0603 for a 2010 Nissan Pathfinder indicate?

The code P0603 in a 2010 Nissan Pathfinder refers to a malfunction in the Engine Control Module (ECM) power supply circuit.

2. What are common symptoms of the P0603 code in a 2010 Nissan Pathfinder?

Common symptoms of the P0603 code may include engine stalling, rough idling, decreased fuel efficiency, and issues with acceleration.

3. What are the possible causes of the P0603 code in a 2010 Nissan Pathfinder?

Possible causes of the P0603 code include a faulty ECM relay, damaged ECM power supply circuits, loose or corroded wiring connections, or a defective ECM.

4. How do I diagnose the P0603 code in a 2010 Nissan Pathfinder?

Diagnosing the P0603 code typically involves using a diagnostic scanner to retrieve the code and then inspecting the ECM relay, power supply circuits, and wiring connections for any issues.

5. Can I still drive my 2010 Nissan Pathfinder with the P0603 code present?

It is not recommended to drive your vehicle with the P0603 code present, as it can lead to further damage to the ECM and other engine components.

6. How can I repair the P0603 code in a 2010 Nissan Pathfinder?

Repairing the P0603 code may involve replacing the faulty ECM relay, repairing damaged wiring connections, or replacing the ECM if it is determined to be defective.

7. Is it necessary to reset the ECM after repairing the P0603 code in a 2010 Nissan Pathfinder?

Yes, it is recommended to reset the ECM after repairing the P0603 code to clear the error code and ensure proper functioning of the vehicle.

8. Can a DIY enthusiast fix the P0603 code in a 2010 Nissan Pathfinder?

While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the P0603 code may require professional expertise and specialized tools.

9. How much does it cost to repair the P0603 code in a 2010 Nissan Pathfinder?

The cost of repairing the P0603 code can vary depending on the cause of the issue, parts needed for replacement, and labor rates at the repair shop. It is advisable to obtain quotes from different mechanics.

10. How can I prevent the P0603 code from occurring in my 2010 Nissan Pathfinder in the future?

Regular maintenance, such as checking and cleaning electrical connections, inspecting the ECM relay, and ensuring proper wiring integrity, can help prevent the occurrence of the P0603 code in the future.