For Shop Owners

P0840 NISSAN - Transmission Fluid Pressure Sensor 'A'

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Faulty Transmission Fluid Pressure Sensor 'A'
  • Transmission Fluid Pressure Sensor 'A' harness is open or shorted
  • Transmission Fluid Pressure Sensor 'A' poor electrical connection
  • Transmission Valve Body
What does this mean?

Tech notes

There is a factory service bulletin for the following Nissan Models:

2007-2008 Nissan Altima
2007-2008 Nissan Rogue
2007-2008 Nissan Sentra
The bulletin suggests replacing the transmission valve body.

2007 Nissan Maxima

For Nissan vehicles with with CVT transmission, Nissan has extended the CVT warranty from 5 years/60,000 to 10 years/120,000 miles
What does this mean?

Possible symptoms

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

P0840 NISSAN Description

The transmission fluid pressure sensor A (primary pressure sensor) detects primary pressure of Continuously Variable Transmission (CVT) and sends Transmission Control Module (TCM) the signal.
OBDII Code P0840 Nissan - Transmission Fluid Pressure Sensor 'A' -

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P0840 NISSAN Comments

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Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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Posted and Edit by 05-10-2017

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