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:
Expansion tank and coolant level sensor - removal and refitting
Removal
1 With the engine cold, slowly unscrew the
expansion tank cap to release any remaining
pressure from the cooling system. Remove
the cap.
2 Place a suitable container beneath the
expansio ...
Fuel system (1.6 and 1.8 litre (R6A type) CVH) - depressurisation
Remember to depressurise the
fuel system before loosening any
connections.
Refer to the precautions in
Section 1 before proceeding. The fuel
system will remain pressurised after the
engine is sw ...
Modulator drivebelt (antilock braking system) - removal and
refitting
Note: Whenever an ABS modulator adjuster
bolt is slackened or removed, the bolt threads
should be lightly coated with grease to
prevent the possibility of bolt seizure. Take
care not to contaminat ...
