AutoCodes – Nissan – P0643 2012 Nissan Rogue

P0643 2012 Nissan Rogue Code - Sensor Power Supply Circuit Short

Quick Answer

The control module has 2 internal 5-volt reference buses called "5-volt reference 1" and"5-volt reference 2". Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM circuit poor electrical connection. 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: P0643 2012 Nissan Rogue indicates Sensor Power Supply Circuit Short.
Common causes: Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM circuit poor electrical connection.
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 2,782

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0643 2012 Nissan Rogue Description

The control module has 2 internal 5-volt reference buses called "5-volt reference 1" and"5-volt reference 2". Each reference bus provided 5-volt reference circuit for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses.

OBDII Code P0643 2012 Nissan Rogue - Sensor Power Supply Circuit Short - AutoCodes.com — P0643 2012 Nissan Rogue Code - Sensor Power Supply Circuit Short

What does this mean?

What are the Possible Causes of the DTC P0643 2012 Nissan Rogue?

Faulty Engine Control Module (ECM)
ECM harness is open or shorted
ECM circuit poor electrical connection
Shorted sensor on 5 volt circuit
Accelerator pedal position sensor (APP sensor 1)
Power steering pressure sensor
EVAP control system pressure sensor
Refrigerant pressure sensor

How to Fix the DTC P0643 2012 Nissan Rogue?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0643 2012 Nissan Rogue 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 P0643 2012 Nissan Rogue code?

Need more information on how to fix the P0643 2012 Nissan Rogue 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 P0643 2012 Nissan Rogue Code

1. What does the OBDII code P0643 mean on a 2012 Nissan Rogue?

P0643 indicates a Sensor Power Supply Circuit Short, meaning the vehicle's control module has detected a voltage issue in the sensor power supply circuit.

2. What are the common symptoms of P0643 in a 2012 Nissan Rogue?

Symptoms may include the check engine light turning on, poor engine performance, reduced fuel efficiency, hesitation during acceleration, or the vehicle going into limp mode.

3. What causes the P0643 code to appear in a 2012 Nissan Rogue?

Potential causes include a shorted or damaged sensor, a faulty wiring harness, a bad PCM (Powertrain Control Module), or a loose or corroded electrical connector.

4. Is it safe to drive a 2012 Nissan Rogue with a P0643 code?

Driving with a P0643 code is not recommended as it can lead to poor engine performance, potential stalling, or further damage to the vehicle's electrical system.

5. How do you diagnose the P0643 code in a 2012 Nissan Rogue?

Diagnosis involves using a scan tool to verify the code, inspecting the wiring harness for damage, checking for loose or corroded connections, and testing the sensors and PCM for proper voltage levels.

6. Can a faulty PCM cause the P0643 code in a 2012 Nissan Rogue?

Yes, a malfunctioning Powertrain Control Module can cause the P0643 code if it fails to regulate the sensor power supply circuit correctly.

7. Which sensors could trigger the P0643 code in a 2012 Nissan Rogue?

Sensors like the throttle position sensor, mass airflow sensor, or manifold absolute pressure sensor, among others, could trigger the P0643 code if they experience a short.

8. How much does it cost to repair a P0643 code in a 2012 Nissan Rogue?

Repair costs can vary, ranging from $50 to $200 for wiring or connector repairs, and up to $1,000 or more if the PCM needs replacement.

9. Can a blown fuse cause the P0643 code in a 2012 Nissan Rogue?

Yes, a blown fuse in the sensor power supply circuit can disrupt voltage and trigger the P0643 code.

10. What steps can I take to prevent the P0643 code in my 2012 Nissan Rogue?

Regularly inspect and maintain the vehicle's wiring, ensure all connectors are secure and clean, and promptly address any sensor-related issues to prevent circuit shorts.