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:
Spark plug renewal - RS Turbo models (Every 6000 miles or 6
months)
1 The correct functioning of the spark plugs is
vital for the correct running and efficiency of
the engine. It is essential that the plugs fitted
are appropriate for the engine, and the
suitable t ...
Rear seat catch - removal and refitting
Saloon models
1 Working in the luggage compartment,
release the seat catch by pulling the release
knob, or if the cable is broken, use a
screwdriver to release the catch itself.
2 Fold the backre ...
Engine/transmission - reconnection and installation
1 This is a direct reversal of removal and
separation from the transmission. Take care
not to damage the radiator or front wings
during installation.
Reconnection
2 Make sure that the engine adap ...
