AutoCodes - Nissan - P0643 2007 NISSAN SENTRA

P0643 2007 NISSAN SENTRA Code - Sensor Power Supply Circuit Short

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P0643 2007 NISSAN SENTRA code possible causes

  • 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 do I fix the P0643 2007 NISSAN SENTRA code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the P0643 2007 NISSAN SENTRA code

Labor: 1.0

The cost of diagnosing the P0643 2007 NISSAN SENTRA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0643 2007 NISSAN SENTRA code detected?

The Engine Control Module (ECM) has detected the sensor 5 volt reference circuit voltage is higher than expected

|What are P0643 2007 NISSAN SENTRA code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|P0643 2007 NISSAN SENTRA code 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 2007 Nissan Sentra - Sensor Power Supply Circuit Short - AutoCodes.com

|Need more information with the P0643 2007 NISSAN SENTRA code?

Need more information on how to fix the P0643 2007 NISSAN SENTRA code? Get Access to Factory Service Manuals

|Need help with a P0643 2007 NISSAN SENTRA code?

Get the P0643 2007 Nissan Sentra code diagnosed by a professional: Find a repair shop in your area

|P0643 2007 NISSAN SENTRA code comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0643 2007 Nissan Sentra code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧
Repair Importance Level: 3
 
1=Low 2=Medium 3=High What is this?
Repair Difficulty Level: 3
 
1=Easy 2=Moderate 3=Hard What is this?