Nissan P1731: A/T 1st Engine Braking

Is your scanner showing Nissan P1731?
No worries. We'll show you what it means and how to deal with it.

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Nissan P1731: A/T 1st Engine Braking

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What Does The Nissan P1731 Code Mean?

This is not an OBD-II self-diagnostic item. Diagnostic trouble code P1731 is detected under the following conditions:

  • When TCM does not receive the proper voltage signal from the sensor.
  • When TCM monitors each ATF pressure switch and solenoid monitor value, and detects as irregular when engine brake of 1st gear acts other than at “1” position.

What Are The Potential Causes Of The Nissan P1731 Code?

  • Harness or connectors: The sensor circuit is open or shorted
  • Low coast brake solenoid valve
  • ATF pressure switch 2

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> JF011E/JF015E CVT Transmission Pressure Sensor Switch for Nissan

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

AUTOMATIC TRANSMISSION SERVICE MANUAL for P1731 – 2006 Pathfinder, pages 143-144.

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