Ford Focus Service Manual: Heated Oxygen Sensor (HO2S)

Ford Focus Service Manual / Powertrain / Internal Combustion Powertrain Control / Engine Control / Heated Oxygen Sensor (HO2S)

Special Tool(s)

Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)

Material

Item	Specification
High Temperature Nickel Anti-Seize Lubricant XL-2	ESE-M12A4-A
Penetrating and Lock Lubricant (US); Penetrating Fluid (Canada) XL-1 (US); CXC-51-A (Canada)	—

Removal and Installation

Disconnect the electrical connector and detach the wiring retainer.

NOTE:
If necessary, lubricate the sensor threads with penetrating and lock lubricant to assist in removal.
Using the Exhaust Gas Oxygen Sensor Socket, remove the Heated Oxygen Sensor (HO2S) .
- Calculate the correct torque wrench setting for the following torque. Refer to the Torque Wrench Adapter Formulas in the Appendix.
- To install, tighten to 48 Nm (35 lb-ft).

NOTICE: Make sure that the sensor wiring is routed away from hot surfaces and sharp edges or damage to the wiring may occur.

NOTE:
Apply a light coat of anti-seize lubricant to the threads of the HO2S .

NOTE:
Make sure that the electrical connector locking tab is engaged.
To install, reverse the removal procedure.

Catalyst Monitor Sensor

Special Tool(s) Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A) Material Item Specification High Temperature Nickel Anti-Seize Lubrica ...

Mass Air Flow (MAF) Sensor

Item Part Number Description 1 14A464 Mass Air Flow (MAF) sensor electrical connector 2 W709287 MAF sensor screw (2 required) 3 ...

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