Nissan Frontier D22. Manual - part 577

DTC P0138, P0158 HO2S2

EC-1411

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than the ECM terminals, such as the ground.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

56

OR

Heated oxygen sensor 2 
(bank 1)

[Engine is running]

●

Warm-up condition

●

Revving engine from idle to 3,000 rpm quickly after 
the following conditions are met

–

Keeping the engine speed between 3,500 and 4,000 
rpm for 1 minute and at idle for 1 minute under no 
load

0 - Approximately 1.0V

EC-1412

[VG33ER]

DTC P0138, P0158 HO2S2

BANK 2

BBWA1080E

DTC P0138, P0158 HO2S2

EC-1413

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than the ECM terminals, such as the ground.

Diagnostic Procedure

UBS00DVP

1. 

INSPECTION START

1.

Turn ignition switch OFF.

2.

Loosen and retighten engine ground screws.

3.

Check heated oxygen sensor 2 harness protector color.

4.

Disconnect corresponding heated oxygen sensor 2 harness
connector.

5.

Disconnect ECM harness connector.

>> GO TO 2.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

57

Y

Heated oxygen sensor 2 
(bank 2)

[Engine is running]

●

Warm-up condition

●

Revving engine from idle to 3,000 rpm quickly after 
the following conditions are met

–

Keeping the engine speed between 3,500 and 4,000 
rpm for 1 minute and at idle for 1 minute under no 
load

0 - Approximately 1.0V

BBIA0418E

PBIB1423E

EC-1414

[VG33ER]

DTC P0138, P0158 HO2S2

2. 

CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.

2.

Check harness continuity between ECM terminal or HO2S2 terminal and ground as follows.

Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 3.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

3. 

CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between HO2S2 terminal 4 and engine ground.
Refer to Wiring Diagram.

2.

Also check harness for short to power.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness for open between heated oxygen sensor 2 and engine ground.

>> Repair open circuit to ground or short to power in harness or connectors.

5. 

CHECK HO2S2 CONNECTORS FOR WATER

Check heated oxygen sensor 2 connector and harness connector for water.
Water should not exist.

OK or NG

OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG

>> Repair or replace harness or connectors.

DTC

Terminals

Bank

ECM

Sensor

P0138

56

1

Bank 1 

P0158

57

1

Bank 2

Continuity should exist.

DTC

Terminals

Bank

ECM or sensor

Ground

P0138

56 or 1

Ground

Bank 1 

P0158

57 or 1

Ground

Bank 2

Continuity should not exist.

Continuity should exist.