Lincoln Navigator: Electronic Engine Controls - 3.5L EcoBoost (272kW/370PS) / Heated Oxygen Sensor (HO2S). Removal and Installation

Special Tool(s) / General Equipment

303-476 (T94P-9472-A) Socket, Exhaust Gas Oxygen Sensor TKIT-1994-LM/M TKIT-1994-F TKIT-1994-FLM/FM

Materials

Removal

Right hand (RH) Heated oxygen sensor (HO2S)

1. With the vehicle in NEUTRAL, position it on a hoist.
   Refer to: Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation).
   

1. If equipped, remove the underbody shield.
   

1. 
   
   • Disconnect the electrical connector and harness retainers.
     
   • Apply penetrating oil to sensor, using the special tool remove the HO2S .
     Use Special Service Tool: 303-476 (T94P-9472-A)  Socket, Exhaust Gas Oxygen Sensor.
     Material: Motorcraft® Penetrating and Lock Lubricant / XL-1

Left hand (LH) Heated oxygen sensor (HO2S)

1. With the vehicle in NEUTRAL, position it on a hoist.
   Refer to: Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation).
   

1. If equipped, remove the underbody shield.
   

1. 
   
   • Disconnect the electrical connector and harness retainer.
     
   • Apply penetrating oil to sensor, using the special tool remove the HO2S .
     Use Special Service Tool: 303-476 (T94P-9472-A)  Socket, Exhaust Gas Oxygen Sensor.
     Material: Motorcraft® Penetrating and Lock Lubricant / XL-1

Installation

Left hand (LH) Heated oxygen sensor (HO2S)

1. 
   
   • Apply anti-seize to thread of sensor, using special tool install the HO2S .
     Torque: 35 lb.ft (48 Nm)
   • Connect the electrical connector and harness retainer.
     Use Special Service Tool: 303-476 (T94P-9472-A)  Socket, Exhaust Gas Oxygen Sensor.
     Material: Motorcraft® High Temperature Nickel Anti-Seize Lubricant / XL-2

1. If equipped, install the underbody shield.
   Torque: 71 lb.in (8 Nm)

Right hand (RH) Heated oxygen sensor (HO2S)

1. 
   
   • Apply anti-seize to thread of sensor, using special tool install the HO2S .
     Torque: 35 lb.ft (48 Nm)
   • Connect the electrical connector and harness retainers.
     Use Special Service Tool: 303-476 (T94P-9472-A)  Socket, Exhaust Gas Oxygen Sensor.
     Material: Motorcraft® High Temperature Nickel Anti-Seize Lubricant / XL-2

1. If equipped, install the underbody shield.
   Torque: 71 lb.in (8 Nm)