AutoCodes – Nissan – P0643 2010 Nissan Pathfinder

P0643 2010 Nissan Pathfinder 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 2010 Nissan Pathfinder 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,592

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 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0643 2010 Nissan Pathfinder 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 2010 Nissan Pathfinder - Sensor Power Supply Circuit Short - AutoCodes.com — P0643 2010 Nissan Pathfinder Code - Sensor Power Supply Circuit Short

What does this mean?

What are the Possible Causes of the DTC P0643 2010 Nissan Pathfinder?

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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0643 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 P0643 2010 Nissan Pathfinder code?

Need more information on how to fix the P0643 2010 Nissan Pathfinder code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0643 2010 Nissan Pathfinder code diagnosed by a professional: Find a repair shop in your area

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 2010 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P0643 in a 2010 Nissan Pathfinder?

The common symptoms of OBDII code P0643 in a 2010 Nissan Pathfinder include issues with the vehicle's starting, rough idling, and potential stalling.

2. What does the OBDII code P0643 mean for a 2010 Nissan Pathfinder?

OBDII code P0643 for a 2010 Nissan Pathfinder indicates a problem with the sensor power supply circuit short.

3. What are the possible causes of OBDII code P0643 in a 2010 Nissan Pathfinder?

Possible causes of OBDII code P0643 in a 2010 Nissan Pathfinder include a faulty sensor, damaged wiring, or a malfunctioning sensor power supply circuit.

4. How can I diagnose OBDII code P0643 in my 2010 Nissan Pathfinder?

To diagnose OBDII code P0643 in a 2010 Nissan Pathfinder, you can use an OBDII scanner to read the code and then inspect the sensor power supply circuit for any visible damage or loose connections.

5. What are the repair options for OBDII code P0643 in a 2010 Nissan Pathfinder?

Repair options for OBDII code P0643 in a 2010 Nissan Pathfinder may include repairing or replacing the faulty sensor, fixing damaged wiring, or addressing issues with the sensor power supply circuit.

6. Can OBDII code P0643 on a 2010 Nissan Pathfinder be fixed at home?

Depending on the root cause of OBDII code P0643, some DIY enthusiasts may be able to address the issue at home by following repair guides and using the necessary tools.

7. Is it safe to continue driving a 2010 Nissan Pathfinder with OBDII code P0643?

It is not recommended to continue driving a 2010 Nissan Pathfinder with OBDII code P0643, as it can lead to potential further damage and affect the vehicle's performance.

8. How much does it typically cost to repair OBDII code P0643 in a 2010 Nissan Pathfinder?

The cost to repair OBDII code P0643 in a 2010 Nissan Pathfinder can vary depending on the extent of the issue, the parts needed, and whether you choose to perform the repairs yourself or seek professional help.

9. Are there any preventive measures to avoid OBDII code P0643 in a 2010 Nissan Pathfinder?

Regular vehicle maintenance, including inspecting sensors and wiring, can help prevent issues like OBDII code P0643 in a 2010 Nissan Pathfinder.

10. Can OBDII code P0643 in a 2010 Nissan Pathfinder affect fuel efficiency?

Yes, OBDII code P0643 in a 2010 Nissan Pathfinder can potentially affect fuel efficiency due to its impact on the sensor power supply circuit, which can lead to improper engine performance.