AutoCodes – Nissan – P0603 2009 Nissan Sentra

P0603 2009 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 2009 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 2,830

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 2009 Nissan Sentra Description

OBDII Code P0603 2009 Nissan Sentra - Engine Control Module Power Supply Circuit - AutoCodes.com — P0603 2009 Nissan Sentra Code - Engine Control Module Power Supply Circuit

What does this mean?

What are the Possible Causes of the DTC P0603 2009 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ECM Outdated Program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 2009 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 2009 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 2009 Nissan Sentra code?

Need more information on how to fix the P0603 2009 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 2009 Nissan Sentra Code

1. What does OBDII code P0603 mean for a 2009 Nissan Sentra?

- OBDII code P0603 in a 2009 Nissan Sentra indicates an issue with the Engine Control Module's power supply circuit.

2. What are the common symptoms of a P0603 code in a 2009 Nissan Sentra?

- Common symptoms of a P0603 code in a 2009 Nissan Sentra may include engine stalling, rough idling, and problems with starting the vehicle.

3. What are the possible causes of a P0603 code in a 2009 Nissan Sentra?

- The main causes of a P0603 code in a 2009 Nissan Sentra can be a faulty Engine Control Module (ECM), damaged wiring in the power supply circuit, or a disconnected power supply to the ECM.

4. How can I diagnose a P0603 code in a 2009 Nissan Sentra?

- To diagnose a P0603 code in a 2009 Nissan Sentra, you can use an OBDII scanner to read the code, check the power supply to the ECM, and inspect the wiring for any visible damage.

5. Can a P0603 code in a 2009 Nissan Sentra cause serious damage to the vehicle?

- While a P0603 code in a 2009 Nissan Sentra may not cause immediate serious damage, it can lead to drivability issues and should be addressed promptly to avoid potential long-term problems.

6. How can I repair a P0603 code in a 2009 Nissan Sentra?

- To repair a P0603 code in a 2009 Nissan Sentra, you may need to replace the ECM if it is faulty, repair any damaged wiring in the power supply circuit, or ensure a proper connection to the ECM.

7. Is it safe to continue driving with a P0603 code in a 2009 Nissan Sentra?

- It is not recommended to continue driving with a P0603 code in a 2009 Nissan Sentra as it can lead to further issues with the vehicle's performance and reliability.

8. Will resetting the OBDII code P0603 in a 2009 Nissan Sentra make it go away permanently?

- Resetting the P0603 code in a 2009 Nissan Sentra may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

9. How much does it typically cost to repair a P0603 code in a 2009 Nissan Sentra?

- The cost of repairing a P0603 code in a 2009 Nissan Sentra can vary depending on the exact cause of the issue, but it may range from a few hundred dollars to over a thousand dollars for more complex repairs.

10. Can a DIY enthusiast fix a P0603 code in a 2009 Nissan Sentra?

- While some DIY enthusiasts may be able to diagnose and repair a P0603 code in a 2009 Nissan Sentra with the right tools and knowledge, it is recommended to consult with a professional mechanic for proper diagnosis and repair.