Nissan Frontier D22. Manual - part 416

DTC P0128 THERMOSTAT FUNCTION

EC-767

[VG33E]

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EC

Component Inspection

UBS00DHM

ENGINE COOLANT TEMPERATURE SENSOR

1.

Check resistance as shown in the figure.

<Reference data>

2.

If NG, replace engine coolant temperature sensor.

Removal and Installation

UBS00DHN

ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EM-80, "OUTER COMPONENT PARTS"

 .

SEF152P

Temperature 

°C (°F)

Resistance k

Ω

20 (68)

2.1 - 2.9

50 (122) 

0.68 - 1.00

90 (194)

0.236 - 0.260

SEF012P

EC-768

[VG33E]

DTC P0132, P0152 HO2S1

DTC P0132, P0152 HO2S1

PFP:22690

Component Description

UBS00DHO

The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 has a closed-end tube
made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts
the injection pulse duration to achieve the ideal air-fuel ratio. The
ideal air-fuel ratio occurs near the radical change from 1V to 0V.

CONSULT-II Reference Value in Data Monitor Mode

UBS00DHP

Specification data are reference values.

On Board Diagnosis Logic

UBS00DHQ

To judge the malfunction, the diagnosis checks that the heated oxy-
gen sensor 1 output is not inordinately high.

SEF463R

SEF288D

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S1 (B1)
HO2S1 (B2)

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Engine: After warming up

Maintaining engine speed at 2,000 
rpm

0 - 0.3V 

←→ Approx. 0.6 - 1.0V

HO2S1 MNTR 
(B1)
HO2S1 MNTR 
(B2)

LEAN 

←→ RICH

Changes more than 5 times during 
10 seconds.

PBIB1847E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0132
(Bank 1)

Heated oxygen sensor 
1 circuit high voltage

An excessively high voltage from the sensor is 
sent to ECM.

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Harness or connectors
(The sensor circuit is open or shorted)

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Heated oxygen sensor 1

P0152
(Bank 2)

DTC P0132, P0152 HO2S1

EC-769

[VG33E]

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DTC Confirmation Procedure

UBS00DHR

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.

 WITH CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 5 seconds.

3.

Turn ignition switch ON.

4.

Select “DATA MONITOR” mode with CONSULT-II.

5.

Restart engine and let it idle for 2 minutes.

6.

If 1st trip DTC is detected, go to 

EC-773, "Diagnostic Procedure"

.

 WITH GST

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Restart engine and let it idle for 2 minutes.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Restart engine and let it idle for 2 minutes.

6.

Select MODE 3 with GST.

7.

If DTC is detected, go to 

EC-773, "Diagnostic Procedure"

 .

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When using GST, DTC Confirmation Procedure should be performed twice as much as when using
CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis. There-
fore, using CONSULT-II is recommended.

SEF174Y

EC-770

[VG33E]

DTC P0132, P0152 HO2S1

Wiring Diagram

UBS00DHS

BANK 1

BBWA1075E