Nissan Pathfinder (2006 year). Manual - part 174

DTC P0132, P0152 A/F SENSOR 1

EC-251

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2006 Pathfinder

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

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 ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

UBS00KEE

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws. Refer to 

EC-151, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

TERMI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

24

G

A/F sensor 1 heater
 (Bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 5V

57

GR

A/F sensor 1 (Bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 2.6V

58

O

Approximately 2.3V

76

V

Approximately 3.1V

77

Y

Approximately 2.3V

PBIB1584E

BBIA0539E

EC-252

DTC P0132, P0152 A/F SENSOR 1

2006 Pathfinder

2. 

CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect A/F sensor 1 harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between A/F sensor 1 terminal 3 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E5, F14

●

IPDM E/R connector E119

●

10A fuse

●

Harness for open or short between A/F sensor 1 and fuse

>> Repair or replace harness or connectors.

Voltage: Battery voltage

BBIA0544E

PBIB1683E

DTC P0132, P0152 A/F SENSOR 1

EC-253

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2006 Pathfinder

4. 

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between A/F sensor 1 terminal and ECM terminal as follows.
Refer to Wiring Diagram.

4.

Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

5.

Also check harness for short to power.

OK or NG

OK

>> GO TO 5.

NG

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

5. 

CHECK INTERMITTENT INCIDENT

Perform 

EC-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace.

6. 

REPLACE A/F SENSOR 1

Replace A/F sensor 1.

CAUTION:

●

Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.

●

Before installing new A/F sensor, clean exhaust system threads using Heated Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

>> INSPECTION END

A/F sensor 1 terminal

ECM terminal

Bank1

1

16

2

75

5

35

6

56

Bank 2

1

76

2

77

5

57

6

58

Continuity should exist.

Bank 1

Bank 2

A/F sensor 1 terminal

ECM terminal

A/F sensor 1 terminal

ECM terminal

1

16

1

76

2

75

2

77

5

35

5

57

6

56

6

58

Continuity should not exist.

EC-254

DTC P0132, P0152 A/F SENSOR 1

2006 Pathfinder

Removal and Installation

UBS00KEF

AIR FUEL RATIO (A/F) SENSOR 1

Refer to 

EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"

 .

DTC P0133, P0153 A/F SENSOR 1

EC-255

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2006 Pathfinder

DTC P0133, P0153 A/F SENSOR 1

PFP:22693

Component Description

UBS00KF2

The air fuel ratio (A/F) sensor 1 is a planar dual-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is the combination of a
Nernst concentration cell (sensor cell) with an oxygen-pump cell,
which transports ions. It has a heater in the element.
The sensor is capable of precise measurement   = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide   range (0.7 <

 < air).

The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.

An electronic circuit controls the pump current through the oxygen-
pump cell so that the composition of the exhaust gas in the diffusion
gap remains constant at   = 1. Therefore, the A/F sensor 1 is able to
indicate air/fuel ratio by this pumping of current. In addition, a heater
is integrated in the sensor to ensure the required operating tempera-
ture of 700 - 800

°

C (1,292 - 1,472

°

F).

CONSULT-II Reference Value in Data Monitor Mode

UBS00KF3

Specification data are reference values.

On Board Diagnosis Logic

UBS00KF4

To judge the malfunction of A/F sensor 1, this diagnosis measures response time of the A/F signal computed
by ECM from the A/F sensor 1 signal. The time is compensated by engine operating (speed and load), fuel
feedback control constant, and the A/F sensor 1 temperature index. Judgment is based on whether the com-
pensated time (the A/F signal cycling time index) is inordinately long or not.

SEF579Z

SEF580Z

MONITOR ITEM

CONDITION

SPECIFICATION

A/F SEN1 (B1)
A/F SEN1 (B2)

●

Engine: After warming up

Maintaining engine speed at 
2,000 rpm

 Fluctuates around 1.5V

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible Cause

P0133
0133
(Bank 1)

Air fuel ratio (A/F) sensor 1 
circuit slow response

●

The response of the A/F signal computed by 
ECM from A/F sensor 1 signal takes more than 
the specified time.

●

Harness or connectors
(The A/F sensor 1 circuit is open or 
shorted.)

●

A/F sensor 1

●

A/F sensor 1 heater

●

Fuel pressure

●

Fuel injector

●

Intake air leaks

●

Exhaust gas leaks

●

PCV

●

Mass air flow sensor

P0153
0153
(Bank 2)

EC-256

DTC P0133, P0153 A/F SENSOR 1

2006 Pathfinder

DTC Confirmation Procedure

UBS00KF5

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.

 WITH CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1minute under no load.

4.

Let engine idle for 1 minute.

5.

Select “A/F SEN1(B1) P1278/P1279” (for DTC P0133) or “A/F SEN1(B1) P1288/P1289” (for DTC P0153)
of “A/F SEN1” in “DTC WORK SUPPORT” mode with CONSULT-II.

6.

Touch “START”.
If “COMPLETED” appears on CONSULT-II screen, go to step
10.
If “COMPLETED” does not appear on CONSULT-II screen, go to
the following step.

7.

After perform the following procedure, “TESTING” will be dis-
played on the CONSULT-II screen.

a.

Increase the engine speed up to 4,000 to 5,000 rpm and keep it
for 10 seconds.

b.

Fully release accelerator pedal and then let engine idle for about
10 seconds.
If “TESTING” is not displayed after 10 seconds, refer to 

EC-

134, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 .

8.

Wait for about 20 seconds at idle at under the condition that
“TESTING” is displayed on the CONSULT-II screen.

9.

Make sure that “TESTING” changes to “COMPLETED”.
If “TESTING” changed to “OUT OF CONDITION”, refer to

EC-134, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 . 

10. Make sure that “OK” is displayed after touching “SELF-DIAG

RESULT”.
If “NG” is displayed, go to 

EC-261, "Diagnostic Procedure"

 .

 WITH GST

1.

Start engine and warm it up to normal operating temperature.

2.

Select Service $01 with GST.

3.

Calculate the total value of “Short term fuel trim” and “Long term fuel trim” indications.
Make sure that the total percentage should be within 

±

15%.

If OK, go to the following step.
If NG, check the following.

PBIB0756E

PBIB1925E

PBIB0758E

DTC P0133, P0153 A/F SENSOR 1

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Intake air leaks

●

Exhaust gas leaks

●

Incorrect fuel pressure

●

Lack of fuel

●

Fuel injector

●

Incorrect PCV hose connection

●

PCV valve

●

Mass air flow sensor

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1minute under no load.

6.

Let engine idle for 1 minute.

7.

Increase the engine speed up to 4,000 to 5,000 rpm and keep it for 10 seconds.

8.

Fully release accelerator pedal and then let engine idle for about 1 minute.

9.

Select Service $03 with GST and make sure that no DTC is displayed.
If the DTC is displayed, go to 

EC-261, "Diagnostic Procedure"

 .

EC-258

DTC P0133, P0153 A/F SENSOR 1

2006 Pathfinder

Wiring Diagram

UBS00KF6

BANK 1

BBWA2360E