AutoCodes – Nissan – P0605 2012 Nissan Altima Sedan

P0605 2012 Nissan Altima Sedan Code - Engine Control Module Fault

Quick Answer

The Engine Control Module (ECM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. Common causes include Engine Control Module (ECM) may be faulty, ECM harness power supply circuit is open or shorted, ECM harness ground 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: P0605 2012 Nissan Altima Sedan indicates Engine Control Module Fault.
Common causes: Common causes include Engine Control Module (ECM) may be faulty, ECM harness power supply circuit is open or shorted, ECM harness ground 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 2,874

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 22, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0605 2012 Nissan Altima Sedan Description

The Engine Control Module (ECM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL.

OBDII Code P0605 2012 Nissan Altima Sedan - Engine Control Module Fault - AutoCodes.com — P0605 2012 Nissan Altima Sedan Code - Engine Control Module Fault

What does this mean?

What are the Possible Causes of the DTC P0605 2012 Nissan Altima Sedan?

Engine Control Module (ECM) may be faulty
ECM harness power supply circuit is open or shorted
ECM harness ground circuit is open or shorted

How to Fix the DTC P0605 2012 Nissan Altima Sedan?

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

Try erasing the code first, if the light comes back ON you may have to replace the ECM to repair the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0605 2012 Nissan Altima Sedan 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 P0605 2012 Nissan Altima Sedan 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 P0605 2012 Nissan Altima Sedan Code

1. What does the OBDII code P0605 mean for a 2012 Nissan Altima Sedan?

P0605 indicates a fault in the Engine Control Module (ECM), specifically an issue with the ECM's internal memory or programming.

2. What are the common symptoms of the P0605 code in a 2012 Nissan Altima?

Symptoms may include engine stalling, rough idling, reduced fuel efficiency, difficulty starting, or the Check Engine Light being illuminated.

3. What causes the P0605 code in a 2012 Nissan Altima?

Possible causes include a corrupted ECM program, internal ECM failure, poor electrical connections, or issues with the vehicle's wiring harness.

4. Can the P0605 code cause drivability issues?

Yes, it can lead to performance problems such as poor acceleration, stalling, or a failure to start the engine.

5. How do you diagnose the P0605 code in a 2012 Nissan Altima?

Diagnosis typically involves using a scan tool to confirm the code, inspecting ECM wiring and connections, and testing the ECM for proper operation.

6. Can a P0605 code be caused by a weak battery?

Yes, a weak or failing battery can sometimes cause voltage fluctuations that may trigger an ECM fault like P0605.

7. Does the ECM need to be replaced if the P0605 code appears?

Not always. The ECM may just need reprogramming or a software update, but if itâ€™s physically damaged, replacement may be necessary.

8. How much does it cost to repair a P0605 code on a 2012 Nissan Altima?

Costs vary depending on the issue. ECM reprogramming may cost $150-$300, while a replacement ECM can range from $500-$1,500 including labor.

9. Can I drive my 2012 Nissan Altima with the P0605 code?

Itâ€™s not recommended, as the vehicle may experience stalling or other safety-related issues while driving.

10. How can I prevent the P0605 code from recurring?

Ensure the vehicleâ€™s battery and electrical system are in good condition, and have the ECM updated with the latest software as recommended by Nissan.