OBDII Code List

P0840 NISSAN - Transmission Fluid Pressure Sensor 'A'

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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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

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.
Nissan Factory Service Bulletin OBDII Code P0840

2007 Nissan Maxima
Nissan Factory Service Bulletin OBDII Code P0840

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

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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