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:
Fuel and exhaust systems - fuel injection
General information and precautions
General information
2.0 litre SOHC models
The fuel injection system fitted to these
models is of the Bosch L-Jetronic type. The
system is under the overall con ...
Fuel injectors - removal and refitting
Caution: Refer to the
precautions in Section 1 before
proceeding.
Note: A tachometer and an exhaust gas
analyser will be required to check the idle
mixture on completion. New seals and
retaining ...
Engine/manual gearbox assembly - removal and separation
Note: Refer to the warning in Section 8 before
proceeding. A suitable hoist and lifting tackle
will be required for this operation.
Removal
1 Proceed as described in Section 9,
paragraphs 1 to 17 ...
