A/F Sensor Removal and Installation

CAUTION:

Touching a hot exhaust system component will cause a burn.

Do not perform any service work on the exhaust system until the exhaust system is cool.

NOTE:

If A/F sensor-1 is replaced, initialize A/F sensor data in ECM. This is not applied to A/F sensor-2.

A/F Sensor-1

Removal

1)Disconnect negative (–) cable at battery.

2)Remove engine cover.

3)Remove battery.

4)Detach connector (1) of A/F sensor-1 from its bracket (2).

5)Disconnect connector from A/F sensor-1 as follows.

a)Move connector lock pin (3) in arrow direction as shown in figure.

b)Push connector lock lever (4) and disconnect connector from A/F sensor-1.

6)Remove exhaust manifold upper cover (1).

7)Remove A/F sensor-1 (2).

Installation

Reverse removal procedure noting the following points.

•Check gasket (1) for deterioration and damage. If gasket is defective, replace A/F sensor.

•Tighten A/F sensor-1 to specified torque.

Tightening torque

A/F sensor-1: 45 N·m (4.6 kgf-m, 33.5 lbf-ft)

•When replacing A/F sensor-1, initialize A/F sensor data in ECM.

A/F Sensor-2

Removal

1)Disconnect negative (–) cable at battery.

2)Detach connector (1) of A/F sensor-2 from its bracket (2).

3)Disconnect connector from A/F sensor-2 as follows.

a)Move connector lock pin (3) in arrow direction as shown in figure.

b)Push connector lock lever (4) and disconnect connector from A/F sensor-2.

4)Hoist vehicle and remove engine undercover.

5)Remove A/F sensor-2 (1) from DPF^®.

Installation

Reverse removal procedure noting the following points.

•Check gasket (1) for deterioration and damage. If gasket defective, replace A/F sensor-2.

•Tighten A/F sensor-2 to specified torque.

Tightening torque

A/F sensor-2: 45 N·m (4.6 kgf-m, 33.5 lbf-ft)