Nissan Frontier D22. Manual - part 318

DTC P0456 EVAP CONTROL SYSTEM

EC-375

[KA24DE]

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18. 

CHECK FUEL TANK TEMPERATURE SENSOR

1.

Remove fuel level sensor unit.

2.

Check resistance between fuel level sensor unit and fuel pump
terminals 2 and 4 by heating with hot water or heat gun as
shown in the figure.

OK or NG

OK

>> GO TO 19.

NG

>> Replace fuel level sensor unit.

19. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

1.

Remove EVAP control system pressure sensor with its harness
connector connected.

2.

Remove hose from EVAP control system pressure sensor.

3.

Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in figure.

CAUTION:

●

Always calibrate the vacuum pump gauge when using it.

●

Do not apply below 

−93.3 kPa (−700 mmHg, −27.56 inHg) or over 101.3 kPa (760 mmHg, 29.56

inHg) of pressure.

4.

Check output voltage between ECM terminal 62 and engine
ground.

CAUTION:

Discard any EVAP control system pressure 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.

OK or NG

OK

>> GO TO 20.

NG

>> Replace EVAP control system pressure sensor.

Temperature 

°C (°F)

Resistance k

Ω

20 (68)

2.3 - 2.7

50 (122)

0.79 - 0.90

SEF852Z

SEF341V

Applied vacuum kPa (mmHg, inHg)

Voltage [V]

Not applied

1.8 - 4.8

-26.7 (-200, -7.87)

 2.1 to 2.5V lower than above value

SEF198V

EC-376

[KA24DE]

DTC P0456 EVAP CONTROL SYSTEM

20. 

CHECK EVAP PURGE LINE

●

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connec-
tion.
Refer to 

EC-565, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 21.

NG

>> Repair or reconnect the hose.

21. 

CLEAN EVAP PURGE LINE

●

Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 22.

22. 

CHECK FUEL LEVEL SENSOR

Refer to 

DI-18, "FUEL LEVEL SENSOR UNIT CHECK"

 .

OK or NG

OK

>> GO TO 23.

NG

>> Replace fuel level sensor unit.

23. 

CHECK INTERMITTENT INCIDENT

●

Refer to 

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

DTC P0460 FUEL LEVEL SENSOR

EC-377

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DTC P0460 FUEL LEVEL SENSOR

PFP:25060

Component Description

UBS00D8B

The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the ECM.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.

On Board Diagnostic Logic

UBS00D8C

When the vehicle is parked, naturally the fuel level in the fuel tank is stable. It means that output signal of the
fuel level sensor does not change. If ECM senses sloshing signal from the sensor, fuel level sensor malfunc-
tion is detected.
Malfunction is detected when even though the vehicle is parked, a signal being varied is sent from the fuel
level sensor to ECM.

DTC Confirmation Procedure

UBS00D8D

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.

WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and wait maximum of 2 consecutive minutes.

4.

If 1st trip DTC is detected, go to 

EC-379, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF725Z

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0460

Fuel level sensor circuit 
noise

Even though the vehicle is parked, a signal 
being varied is sent from the fuel level sensor 
to ECM.

●

Fuel level sensor circuit
(The sensor circuit is open or shorted)

●

Fuel level sensor

SEF195Y

EC-378

[KA24DE]

DTC P0460 FUEL LEVEL SENSOR

Wiring Diagram

UBS00D8E

BBWA1064E