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:
Crankshaft front oil seal - renewal
1 Disconnect the battery negative lead.
2 Slacken the alternator mounting and
adjuster bolts and after pushing the alternator
in towards the engine, slip off the drivebelt.
3 Unscrew and remove th ...
Thermo-time switch - removal and refitting
Removal
1 Disconnect the battery negative lead.
2 Drain the cooling system as described in
Chapter 1.
3 Raise the front of the car and support it on
axle stands (see “Jacking and Vehicle
Support ...
Road test (Every 12 000 miles (20 000 km) or 12 months)
Instruments and electrical
equipment
1 Check the operation of all instruments and
electrical equipment.
2 Make sure that all instruments read
correctly, and switch on all electrical
equipment in ...
