Volkswagen Polo Service & Repair Manual: 4-Pin Heated Oxygen Sensor (HO2S), Removing and Installing
 Note
| Do not repair the heated oxygen sensor wires. Repairing may
result in malfunctions. |
| Use the faulty sensor as a guide for installing all of the
accompanying attachments, cable ties or marking bands. |
| If necessary, identify the heated oxygen sensor (HO2S) using
the protective tube. Refer to
→ Chapter „Oxygen Sensor Unit Protective Pipes“. |
| – |
Remove the faulty oxygen sensor. |
|
|
|
| – |
Lay both of the oxygen sensor next to each other so the
sensor housings are the same level. |
|
|
|
| – |
Tie the excess length of the sensor (approximately 50 to 250
mm) back so it is the same length as the faulty sensor and
secure it with cable ties -1-. |
| – |
Check if the oxygen sensor connector housing is compatible
with the vehicle electrical system side. |
| – |
If necessary, replace the vehicle electrical system
connector with the provided oxygen sensor connector housing.
Refer to
→ Chapter „Contact Housings and Connectors, Repairing“. |
Note
| Only replace the connector housing on older vehicles. The
connector housing is correct on new vehicles. |
| Check the pin assignment. The pins in the new connector
housing are color coded. |
| The packaging for the new heated oxygen sensor contains
additional information. |
| – |
Install the new oxygen sensor in the vehicle. |
|
|
 |
Note
Use the faulty sensor as a guide for installing all of the
accompanying attachments, cable ties or marking bands.
Do ...
Other materials:
Discharge Refrigerant Circuit with A/C Service Station
Caution
If it is suspected that chemicals were added to the
refrigerant circuit to seal leaks, do not connect the
A/C service station and do not extract the refrigerant.
...
Introduction
This chapter contains information on the following subjects:
→ Warning and indicator lamps
→ Handbrake
→ Parking
→ Information on the brakes
→ Brake support systems
→ Switching the TCS on and off
→ Brake flu ...
Checking
–
Turn off the ignition.
–
Connect pressure gauge battery (A/C service station).
–
Take pressure gauge readings. There are two possible results
A and B.
&nbs ...
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6-Pin Universal Oxygen Sensor, Removing and Installing