Last Updated: 08/24/2019 @ 09:29 am

Member Credit: EddyMaxx

Adding some helpful information regarding this code P1706. The sensor was broken and I almost couldn’t find it. Replacing the sensor resolved the code. I ran into this issue and decided to document my findings for anyone needing to troubleshoot this.

P1706 Nissan DTC: Park Neutral Position Switch Circuit Malfunction

The Nissan park neutral position sensor / PNP switch is designed to detect when the shift lever is in neutral or park. If the shift lever is in another gear, the park neutral position switch will not allow electricity to pass from the battery to the starter. A P1706 OBDII code indicates that there is a malfunction with either the switch itself or the wiring connected to it.


  • Inability to start the engine
  • Engine will start with the shift lever is in neutral but not Park
  • Engine will start in any gear


  • Damaged wiring or connectors
  • Failed park neutral position switch

How to Diagnose the Code?

The best way to diagnose a P1706 OBD2 trouble code is to carefully inspect the wiring and connectors leading from the switch itself to the main wiring harness. If no issues are found, the switch itself will have to be tested and possibly replaced.

Automatic Transmission Switch

Part Desc: Neutral Position Switch
Part Number: 31918-3AX01
OEM Price: Around $20-25 Bucks

6-Speed Manual Transmission (2003 Nissan Maxima)

Part Desc: Neutral Position Switch
Part Number: 32006-6J00A
OEM Price: Around $15 Bucks

The wires are Green/White and Black for the Switch.

Don’t confuse the above sensor with the blue one which is your reverse lights sensor. It has a Green/White and Orange Wire. But if you need to replace it, below is the info and photos:

Part Desc: Switch Assy-Reverse Lamp
Part Number: 32005-6J00A
OEM Price: Around $20-25 Bucks

Factory Service Manual Sections (Engine Control EC Section)