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Warning

• A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.

Note

• If the A/F sensor is replaced, always perform each adjustment procedure using the following steps.

STEP	ACTION	PAGE/CONDITION
1	Replace the A/F sensor.	—
2	Switch the ignition ON.	—
3	Perform A/F sensor data reset procedure.	(See AIR FUEL RATIO (A/F) SENSOR DATA RESET [MZR-CD 2.2].)
4	Start the engine.	Verify that the MIL does not illuminate.
5	Switch the ignition to off.	—
6	Switch the ignition ON.	—
7	Perform KOEO self-test procedure.	(See KOEO/KOER SELF TEST [MZR-CD 2.2].)
8	Switch the ignition to off.	—
9	Wait for 20 s.	—
10	Start the engine.	—
11	Perform diesel particulate filter regeneration procedure.	Engine coolant temperature 70 °C {158 °F} or more. (See DIESEL PARTICULATE FILTER REGENERATION [MZR-CD 2.2].)
12	Perform KOER self-test procedure.	Warm up until the exhaust gas temperature (EXHTEMP1, EXHTEMP2 PID) is 100 °C {212 °F} or more. (See KOEO/KOER SELF TEST [MZR-CD 2.2].)
13	Using the following PIDs, verify that the diesel particulate filter regeneration has been completed. ― REG_REQ_A ― REG_REQ_F	(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)
14	Perform repair verification drive mode.	(See OBD DRIVE MODE [MZR-CD 2.2].)
15	Verify that O2S11_CAL value is not 0 using the PID O2S11_CAL. ― If the value is 0, return to the previous step.	—
16	Switch the ignition to off.	—

1.Disconnect the negative battery cable.

2.Remove the floor under cover (RH).

3.Disconnect the A/F sensor connector.

4.Remove in the order indicated in the table.

5.Install in the reverse order of removal.

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A/F Sensor Removal Note

1.Remove the A/F sensor using the SST.

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A/F Sensor Installation Note

1.Install the A/F sensor using the SST.

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