P1707

Code

LAND ROVER P — Powertrain

neutral or park / neutral indication circuits

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 9 EN: 16 RU: 15

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Page language: EN

Faulty park/neutral position (PNP) switch / transmission range sensor
Damaged wiring (open, short to ground, short to battery) or corroded connector at the PNP switch
Poor ground or reference voltage to the switch
Failed or intermittent connector pin(s)
Faulty transmission control module (TCM) or engine control module (ECM) input circuit
Aftermarket starter/shift interlock modifications or accident damage affecting selector linkage

Malfunction Indicator Lamp (MIL) ON / DTC stored
Incorrect gear display for Park/Neutral on dash
Starter cranks only in park/neutral conditions or starter inhibited when in park/neutral
Transmission may enter limp mode or fail to shift properly
Intermittent inability to start or no-crank condition depending on starter interlock behavior

Retrieve freeze frame and full DTC list with a capable scan tool. Note when the fault occurs (engine off/on, range position).
Visual inspection of wiring and connectors at the transmission range/PNP switch and ECM/TCM for corrosion, damage, water ingress or loose pins.
Check related fuses and vehicle grounds.
Use a multimeter to check for reference voltage and ground at the PNP connector with the ignition ON.
Monitor live data/PRNDL inputs with a scan tool while moving selector through positions to confirm correct logic changes.
Perform a wiggle test on wiring while monitoring the input for intermittent changes.

PNP/PRNDL input is usually a switched discrete signal: approx. battery voltage (~10–14 V) when in Park/Neutral or 0 V when not (or vice versa depending on design).
Signal should toggle cleanly between the two states as selector is moved (no slow drifting or pulses).
Connector pin resistance to ground when switch is closed typically near 0–2 ohms; open when switch is open (very high resistance).
Reference power to the switch typically battery voltage present with ignition ON; ground should be

Read and record all stored codes and freeze frame data. Clear codes and re-check to confirm repeatability.
Verify the complaint: with ignition ON, move the gear selector through all positions while watching PRNDL/PNP input live data on the scan tool. Note any positions where signal does not change or is erratic.
Inspect wiring and connector at the PNP/PRNDL switch for damage, corrosion, bent pins, or water entry. Repair or replace as required.
With ignition ON, backprobe the PNP connector: confirm reference voltage present and that the switch output changes state between Park/Neutral and other gears. Use voltmeter/logic probe/oscilloscope if available.
Check continuity from the PNP output pin to the ECM/TCM input pin. Check for shorts to battery or ground.
Verify ground quality for the circuitry—clean and tighten chassis and module grounds if high resistance found.
If wiring and connector test good, bench-test or replace the PNP/PRNDL switch per manufacturer procedure and re-test.
If replacement switch does not correct the issue, test or replace the TCM/ECM input circuit following manufacturer diagnostics (module replacement or repair should be last resort).
After repairs clear codes and perform functional test: confirm correct PRNDL indications, starter interlock function, and road test to ensure code does not return.

⚠️ Status

P1707 — Neutral/Park indication circuit fault. Check park/neutral (PRNDL) switch, wiring/connectors, grounds and transmission control module inputs.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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P1707 — neutral or park / neutral indication circuits