Engine-Codes - Infiniti - P0840 INFINITI

P0840 INFINITI - Transmission Fluid Pressure Sensor 'A'

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0840 INFINITI 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

How is the P0840 INFINITI code repair?

Start by checking 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.

What is the cost to diagnose the P0840 INFINITI code

Labor: 1.0

The cost to diagnose the P0840 INFINITI code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

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

P0840 INFINITI Meaning

The Transmission Fluid Pressure Sensor 'A' (primary pressure sensor) detects primary pressure of Continuously Variable Transmission (CVT) and sends the Transmission Control Module (TCM) the signal. The Diagnostic Trouble Code (DTC) will set when the TCM detects no signal from the Transmission Fluid Pressure Sensor 'A'.

More Information

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