Heated Exhaust Gas Oxygen (HEGO) sensor - removal and refitting
Note: A new sealing ring will be required on refitting.
Removal
1 Apply the handbrake, then jack up the front
of the vehicle and support it on axle stands
(see “Jacking and Vehicle Support”).
2 Disconnect the battery negative lead.
3 Unclip the wiring and disconnect the sensor wiring plug (see illustration).
17.3 Heated exhaust gas oxygen (HEGO) sensor - 1.4 CFI engine
A Sealing ring
B HEGO sensor
C Sensor shield
4 Remove the sensor heat shield, then unscrew the sensor from the exhaust downpipe, and carefully remove it complete with sealing ring.
Warning: Do not touch the tip of the HEGO sensor.
Refitting
5 Refitting is a reversal of removal, bearing in
mind the following points.
6 Clean the sensor threads, and take care not to touch the tip of the sensor during the refitting procedure.
7 Use a new sensor sealing ring.
8 Tighten the sensor to the specified torque.
9 On completion, start the engine and check for leaks between the sensor and the exhaust downpipe.
See also:
Battery terminal check (Every 12 000 miles (20 000 km) or 12 months)
Caution: Before carrying out
any work on the vehicle battery,
read through the precautions
given in “Safety first!” at the
beginning of this manual.
1 The battery fitted as original equipment is
...
Front and rear brake pad/shoe check (Every 6000 miles (10 000 km) or 6
months)
1 Firmly apply the handbrake, then jack up
the front and rear of the car and support it
securely on axle stands (see “Jacking and
vehicle support”).
2 For a quick check, the front brake disc pads
...
Crankcase emission control system components - removal and
refitting
Carburettor and Central Fuel
Injection (CFI) engines
1 On OHV and HCS engines renewal of the
vented oil filler cap and crankcase ventilation
hoses is simply a matter of removing them
from their l ...