How to Read Nissan Codes for Free

Written by katebo
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You can read the codes on your Nissan for free from home. You don't even need to purchase a scan tool to do it. All it takes is a few minutes of your time. The On-Board Diagnostics computer (OBD) stores trouble codes it receives from sensors positioned throughout the Nissan. You can retrieve these codes from the diagnostic mode selector, which can be found in the centre console between the front driver's and passenger's seats.

Skill level:
Moderately Easy

Things you need

  • Screwdriver
  • Nissan owner's manual

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  1. 1

    Put the key into the ignition, and turn the ignition switch to "on," but don't crank the engine.

  2. 2

    Remove the trim panels on the front part of the centre console using a screwdriver.

  3. 3

    Locate the computer attached to a bracket between the firewall and the console. Find the diagnostic mode selector. It is a round hole on the side of the computer. Turn it until it stops. Find red and green lights on the side of the computer. Wait for the red and green LED lights to flash three times then quickly turn the diagnostic mode selector in a counterclockwise direction until it won't turn any more.

  4. 4

    Watch how the lights flash. The red light flashes for the first digit of the code and the green light flashes for the second digit. So if the red light flashes three times and the green light flashes four times, the code is 34. Write down the codes on a piece of paper.

  5. 5

    Look up the meaning of the codes in the Nissan owner's manual.

  6. 6

    Turn the ignition key to the "off" position, and put the trim panels back in place.

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