Nissan Sentra Service Manual: General Precaution
WARNING:
When replacing fuel line parts, be sure to observe the following.
- Put a “CAUTION: FLAMMABLE” sign in the work area.
- Be sure to work in a well ventilated area and have a CO2 fire
extinguisher.
- Do not smoke while working on the fuel system. Keep open flames
and sparks away from the work
area.
CAUTION:
- Before removing fuel line parts, carry out the following
procedures:
- Put drained fuel in an explosion-proof container and put the lid
on securely. Keep the container in
safe area.
- Release fuel pressure from the fuel lines. Refer to EC-49, "EVAPORATIVE
EMISSION SYSTEM : System
Description".
- Disconnect the battery ground cable.
- Always replace O-rings and clamps with new ones.
- Do not kink or twist tubes when they are being installed.
- Do not tighten hose clamps excessively to avoid damaging hoses.
Tighten high-pressure rubber hose clamp so that clamp end
is 3 mm (0.12 in) from hose end.
Tightening torque specifications are the same for all rubber
hose clamps.
Ensure that screw does not contact adjacent parts.

- Apply fuel pressure to the fuel system by turning the ignition
switch to ON (without starting the engine). Then check for
fuel leaks at the fuel tube connections.
- Start the engine and rev the engine, then check for fuel
leaks at the fuel tube connections.
- After installing the tubes, run the engine and check for fuel
leaks at the connections.
- Use only a Genuine NISSAN fuel filler cap as a replacement. If
an incorrect fuel filler cap is used, the MIL may come on.
- For servicing “Evaporative Emission System” parts, refer to
EC-49, "EVAPORATIVE EMISSION SYSTEM : System Description".

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT
PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the
dri ...
Special Service Tool
The actual shape of the tools may differ from those illustrated here.
Commercial Service Tool
...
Other materials:
Dtc/circuit diagnosis
Eco mode switch
Component function check
1. Check eco mode switch operation
Turn ignition switch on.
Check ECO mode indicator lamp turns ON/OFF on combination meter when
turn ECO mode switch ON/
OFF.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Proceed to DM ...
P0139 HO2S2
DTC Logic
DTC DETECTION LOGIC
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen
storage capacity of the three way catalyst 1 causes the longer
switching time. To judge the malfunctions of heated oxygen sensor
2, ...
Headlights
Replacing the halogen headlight bulb
The headlight is a semi-sealed beam type which
uses a replaceable headlight (halogen) bulb. Because
the headlight assembly must be removed
from the vehicle for bulb replacement, see your
NISSAN dealer.
CAUTION
Aiming is not necessary after replacing
t ...
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