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:
Interior mirror - removal and refitting
Removal
1 The interior mirror is bonded to the
windscreen glass. If it must be removed, grip
the mirror firmly and push it forward to break
the adhesive bond.
2 When refitting the mirror, the fol ...
Turbocharger-to-manifold nut check - RS Turbo models (Every 12
000 miles or 12 months)
Check the tightness of the turbocharger-toexhaust
manifold securing nuts using a torque
wrench. ...
General information and precautions
The body electrical system consists of all
lights, wash/wipe equipment, interior
electrical equipment, and associated switches
and wiring.
The electrical system is of the 12 volt
negative earth t ...
