AutoCodes – Nissan – P0603 2011 Nissan Sentra

P0603 2011 Nissan Sentra 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 2011 Nissan Sentra 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 4,061

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 2011 Nissan Sentra Description

OBDII Code P0603 2011 Nissan Sentra - Engine Control Module Power Supply Circuit - AutoCodes.com — P0603 2011 Nissan Sentra Code - Engine Control Module Power Supply Circuit

What does this mean?

What are the Possible Causes of the DTC P0603 2011 Nissan Sentra?

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ECM Outdated Program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 2011 Nissan Sentra?

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 2011 Nissan Sentra 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 2011 Nissan Sentra code?

Need more information on how to fix the P0603 2011 Nissan Sentra 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 P0603 2011 Nissan Sentra Code

1. What does OBDII code P0603 mean for my 2011 Nissan Sentra?

The P0603 code indicates a malfunction in the Engine Control Module Power Supply Circuit.

2. What are the common symptoms of OBDII code P0603 in a 2011 Nissan Sentra?

Common symptoms include poor engine performance, stalling, rough idling, and potential issues with the vehicle's transmission.

3. What are the possible causes of OBDII code P0603 in a 2011 Nissan Sentra?

The code may be triggered by a faulty Engine Control Module (ECM), damaged wiring or connectors in the power supply circuit, or a drained battery.

4. How can I diagnose OBDII code P0603 in my 2011 Nissan Sentra?

Diagnosis typically involves checking the ECM power supply voltage, inspecting wiring and connectors for damage, and testing the battery's condition.

5. Can I still drive my 2011 Nissan Sentra with OBDII code P0603?

It is not recommended to drive the vehicle with a P0603 code present, as it can lead to further damage and potentially unsafe driving conditions.

6. How can I repair OBDII code P0603 in my 2011 Nissan Sentra?

Repair options include replacing the ECM if it is faulty, repairing or replacing damaged wiring or connectors, and ensuring the battery is fully charged.

7. Will resetting the OBDII code P0603 in my 2011 Nissan Sentra make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear.

8. Is it safe to clear the OBDII code P0603 with a diagnostic tool in my 2011 Nissan Sentra?

Clearing the code with a diagnostic tool is safe, but it is important to address the root cause of the issue to prevent future occurrences.

9. How much does it cost to repair OBDII code P0603 in a 2011 Nissan Sentra?

The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and diagnostic services.

10. Can a DIY enthusiast fix OBDII code P0603 in a 2011 Nissan Sentra?

While some aspects of diagnosing and repairing the issue may be possible for DIY enthusiasts, dealing with complex electrical systems like the ECM is best left to professionals.