WARNING: This page is about a different car, the 2007 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Symptom:

Improper fuel gauge indication.
Low-fuel warning lamp indication is irregular.

NOTE: The following symptoms do not indicate a malfunction.

Depending on vehicle position or driving circumstance, the fuel level in the tank shifts and the indication may fluctuate.
If the vehicle is fueled with the ignition switch ON, the indication will update slowly.
If the vehicle is tilted when the ignition switch is turned ON, fuel in the tank may flow to one direction resulting in a change of reading.

CHECK COMBINATION METER INPUT SIGNAL

Select "METER/M&A" on CONSULT-III.

Using "FUEL METER" on "DATA MONITOR", compare the value of "DATA MONITOR" with fuel gauge indication of combination meter.

REFERENCE VALUE OF DATA MONITOR

Fuel gauge indication (approx. segments)	Reference value of data monitor [lit.]
Full (13)	Approx. 55
3/4 (10)	Approx. 38
1/2 (7)	Approx. 25
1/4 (4)	Approx. 13
Empty (0)	Approx. 4

OK or NG

OK: GO TO 2.

NG: Replace combination meter. Refer to "COMBINATION METER ".

CHECK HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Check combination meter and fuel level sensor unit terminals (meter-side and harness-side) for poor connection.
OK or NG

OK: GO TO 3.

NG: Repair or replace terminals or connectors.

CHECK FUEL LEVEL SENSOR UNIT CIRCUIT

Disconnect combination meter connector and fuel level sensor unit connector.

Check continuity between combination meter harness connector (A) and fuel level sensor unit and fuel pump harness connector (B).

CONNECTOR TERMINAL CONTINUITY SPECIFICATION

A		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M24	8	B48	2	Yes

Check continuity between combination meter harness connector (A) and ground.

CONNECTOR TERMINAL CONTINUITY SPECIFICATION

A		Ground	Continuity
Connector	Terminal
M24	8		No

Fig 1: Checking Continuity Between Combination Meter Harness Connector And Ground

OK or NG

OK: GO TO 4.

NG: Repair harness or connector.

CHECK FUEL LEVEL SENSOR UNIT GROUND CIRCUIT

Check continuity between combination meter harness connector (A) and fuel level sensor unit and fuel pump harness connector (B).

CONNECTOR TERMINAL CONTINUITY SPECIFICATION

A		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M24	4	B48	5	Yes

Check continuity between combination meter harness connector (A) and ground.

CONNECTOR TERMINAL CONTINUITY SPECIFICATION

A		Ground	Continuity
Connector	Terminal
M24	4		No

Fig 2: Checking Continuity Between Combination Meter Harness Connector And Ground

OK or NG

OK: GO TO 5.

NG: Repair harness or connector.

CHECK FUEL LEVEL SENSOR UNIT
Check fuel level sensor unit. Refer to "FUEL LEVEL SENSOR UNIT CHECK ".

OK or NG

OK: Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the internal components in the fuel tank. Repair or replace malfunctioning part, if necessary.

NG: Replace fuel level sensor unit.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Fuel Level Sensor Signal Inspection

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?