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P0705 on Lincoln Navigator

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

Factory diagnostic protocol and troubleshooting wire for fault code P0705 specifically for the Lincoln Navigator (2020–2026, 3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque)).

Verified OEM Telemetry & Field Repair Tree
Lincoln Navigator2020–2026
Lincoln Navigator
SUV3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Navigator SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Drivable (Short Trip)
High urgency level
Est. Repair Cost
$120 - $450 (DIY: $40 - $160)
Parts & Labor DIY
Check P0705 On Another Lincoln Model:
Diagnose P0705 on Specific Navigator Model Year:

1. Symptoms of P0705 on Lincoln Navigator

When the Engine Control Module (ECM/PCM) on your Lincoln Navigator (3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque)) logs fault code P0705, drivers commonly observe:

Check Engine Light on on Lincoln Navigator (3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque))
Vehicle will not crank/start in Park (starts only in Neutral) on Lincoln Navigator (3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque))
Gear indicator on dashboard (P R N D 1 2) is blank or displays wrong gear on Lincoln Navigator (3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque))
Transmission shifts harshly or goes into 3rd gear limp mode on Lincoln Navigator (3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque))
Reverse backup lights fail to illuminate on Lincoln Navigator (3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque))
Lincoln Navigator OBD-II Port Location
The 16-pin diagnostic connector is located Under driver side dashboard kick panel. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Lincoln Navigator

Historical warranty claims and technical repair bulletins for Lincoln Navigator point to the following failure distribution:

55%
Misaligned or faulty Transmission Range Sensor / Neutral Safety Switch (NSS) (Lincoln OEM Part)
25%
Corroded or water-logged connector on transmission side (Lincoln OEM Part)
12%
Stretched or misadjusted shift linkage cable (Lincoln OEM Part)
8%
Broken internal switch contacts (Lincoln OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Lincoln Navigator.

3. Step-by-Step DIY Repair Guide for Lincoln Navigator

01
Check PRNDL Live Data

Move gear selector through all positions while monitoring scan tool TR PID to see which gear positions fail to register. on the Lincoln Navigator equipped with 3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque).

Required Tool: OBD-II Scanner
02
Inspect Shift Cable Alignment

Ensure the mechanical shift linkage fully clicks the transmission lever into the physical detent for Park and Neutral. on the Lincoln Navigator equipped with 3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque).

Required Tool: Pliers, Socket Set
03
Test Neutral Safety Switch Continuity

Use multimeter to check continuity across switch pins in Park, Reverse, Neutral, and Drive. on the Lincoln Navigator equipped with 3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque).

Required Tool: Digital Multimeter
04
Replace or Re-align Range Sensor

Loosen mounting bolts, use alignment pin to align sensor slot with transmission shaft in Neutral, torque bolts, or install new OEM sensor. on the Lincoln Navigator equipped with 3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque).

Required Tool: 10mm/12mm Sockets, Alignment Pin
05
Clear Trouble Codes and Verify Starting

Clear DTCs and confirm engine starts in Park and Neutral, reverse lights activate, and gear display is accurate. on the Lincoln Navigator equipped with 3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque).

Required Tool: OBD-II Scanner
Recommended Parts & Testing Tools

Equipment for Diagnosing Lincoln Navigator (P0705)

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Direct-Fit Replacement Part

Lincoln Navigator OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

Direct-fit replacement assembly engineered to OEM tolerances for Lincoln Navigator.

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Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

$29.99 Prime
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Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

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Other Common Fault Codes on Lincoln Navigator

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Lincoln Navigator:

4. Lincoln Navigator P0705 FAQs

What causes code P0705 to trigger on a Lincoln Navigator?

On the Lincoln Navigator (3.5L Twin-Turbo EcoBoost V6 (440HP / 510 lb-ft torque)), P0705 is most frequently caused by Misaligned or faulty Transmission Range Sensor / Neutral Safety Switch (NSS) or Corroded or water-logged connector on transmission side.

Where is the OBD-II port located on my Lincoln Navigator?

On the Lincoln Navigator, the 16-pin DLC diagnostic connector is located Under driver side dashboard kick panel. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Lincoln Navigator with code P0705?

Caution. Vehicle may not start in Park, backup lights may not work, and transmission may lock in Limp Mode. Given that P0705 carries a High severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.