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:
Headlamps and auxiliary lamps - beam alignment
The headlamps are adjustable individually
for both horizontal and vertical alignment from
within the engine compartment. The auxiliary
lamp adjustment is carried out by slackening
the lamp mountin ...
General information and precautions
General information
The engine electrical system includes all
charging, starting and ignition system
components and the engine oil pressure
sensor. Because of their engine-related
functions, thes ...
Fuel system - depressurising
Warning: The fuel system will
remain pressurised after the
engine is switched off. Comply
with relevant safety precautions
during this operation and refer to the
“Safety First” Section at the beg ...
