Possible causes

– Misadjusted Park/Neutral Switch
– Faulty Park/Neutral Switch
– Park/Neutral Switch harness is open or shorted
– Park/Neutral Switch circuit poor electrical connection

Tech notes

For models with “Manual Transmission” the P1706 is for the Neutral Position Switch.

When is the code detected?

The signal of the park/neutral position (PNP) switch is not changed in the process of engine starting and driving.

Symptoms

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

P1706 NISSAN Description

When the shift position is P or N, park/neutral position (PNP) switch is turned ON. The Engine Control Module (ECM) detects the position because the continuity of the line (the ON signal) exists.
The park/neutral position (PNP) switch assembly also indicates a transmission range switch to detect shift lever position.