Porshe 911 (997). Manual - part 148

Removing oxygen sensor behind the catalytic converter

Removing oxygen sensor behind catalytic converter of cylinder bank 1-3

Note

Always expose oxygen sensor wire far enough for it to be able to turn when unscrewing the sensor.

• 

→ 241000  Precautionary measures when handling oxygen sensors

Plug connection for oxygen sensor

1. Disconnect plug connection in left of engine compartment for the oxygen sensor behind catalytic

converter. To do this, first remove the grey connector from the holder and pull the red locking
element upwards. Disconnect cable plug -1- .

2. Release the black cable from the cable

guide.

Clamp for holder of catalytic converter

3. For better accessibility, undo the exhaust clamp by unscrewing the fastening screw -arrow- and remove

the clamp.

Diagnostic system: reading out fault memory and activating systems

 Removing oxygen sensor behind the catalytic converter

749

Releasing oxygen sensor

4. Release oxygen sensor from the vehicle underside using an open-ended wrench or open ring wrench (a/f

22) and screw it out by hand → Releasing oxygen sensor .

Removing oxygen sensor behind catalytic converter of cylinder bank 4-6

Note

Always expose oxygen sensor wire far enough for it to be able to turn when unscrewing the sensor.

• 

→ 241000  Precautionary measures when handling oxygen sensors

1. Disconnect plug connection in right of engine compartment for the oxygen sensor behind catalytic

converter. To do this, first remove the grey connector from the holder and pull the red locking
element upwards. Disconnect cable plug.

2. Release black cable of the oxygen sensor behind catalytic converter from the cable

holder.

Releasing oxygen sensor

3. Undo oxygen sensor using an open-ended wrench or open ring wrench (a/f 22) and screw it out by hand.

Installing oxygen sensor behind the catalytic converter

Diagnostic system: reading out fault memory and activating systems

Removing oxygen sensor behind catalytic converter of cylinder bank 1-3

750

Installing oxygen sensor behind catalytic converter of cylinder bank 1-3

1. Guide the oxygen sensor through so that the cable can be easily routed from the engine

compartment side to the exhaust system.

2. Position the oxygen sensor by hand and screw in as far as

possible.

Tool on oxygen sensor

3. Tighten oxygen sensor with commercially available open ring wrench  accessory for torque

wrench. Open ring wrench angled NR.96-3

 and torque wrench Torque wrench,

signal-transmitting with changeover ratchet NR.90

 and tighten to the specified tightening

torque → Tightening torque: 41 ftlb. +/-3.5 ftlb. . In order to disengage the torque wrench,
actuate catch with a small wire or Allen key → Tool on oxygen sensor .

Clamp for holder of catalytic converter

4. Re-fit exhaust clamp and fit fastening screw to the specified tightening torque → Tightening torque: 17

ftlb. -arrow-

 .

5. Lay black oxygen sensor cable and fix in cable guide. Fit cable plug.

Installing oxygen sensor behind catalytic converter of cylinder bank 4-6

1. Guide the oxygen sensor through so that the cable can be easily routed from the engine

compartment side to the exhaust system.

2. Position the oxygen sensor by hand and screw in as far as

possible.

3. Tighten oxygen sensor with commercially available open ring wrench  accessory for torque

wrench. Open ring wrench angled NR.96-3

 and torque wrench Torque wrench,

signal-transmitting with changeover ratchet NR.90

 and tighten to the specified tightening

Diagnostic system: reading out fault memory and activating systems

Installing oxygen sensor behind catalytic converter of cylinder bank 1-3

751

torque → Tightening torque: 41 ftlb. +/-3.5 ftlb. .

4. Lay black oxygen sensor cable and fix in cable guide. Fit cable plug.

Subsequent work

Subsequent work for installing oxygen sensor behind the catalytic converter

1. Install air cleaner housing → 242519 Removing and installing air cleaner housing - chapter on

"installing".

997110, 997111, 997120, 997121, 997310, 997311, 997320, 997321, 997410, 997411, 997430, 997431,
997610, 997611, 997620, 997621

WARNUNG

Gefahr des Verlusts der Text-Bild-Zuordnung beim Ausdruck.

Aus technischen Gründen kann derzeit nicht ausgeschlossen werden, dass trotz
einwandfreier Darstellung auf dem Bildschirm beim Ausdruck der
Zusammenhang von Text und zugehörigem Bild verloren geht.

• 

Wird der Fehler nicht bemerkt, besteht die Gefahr, daß Arbeiten nicht korrekt
durchgeführt werden und es dadurch zu Personen- und Sachschäden kommt.

• 

→ Vergleichen Sie deshalb nach dem Druckvorgang unbedingt die Ausdrucke mit der
Bildschirmdarstellung. Korrigieren Sie die Ausdrucke im Fehlerfall so, daß der Inhalt der
Bildschirmdarstellung zutreffend wiedergegeben wird.

WARNING

Danger of losing text-figure correspondence when printing out.

For technical reasons, it can currently not be ruled out that the correspondence
between text and associated figure can be lost when it is printed out, even though
the display on the screen is correct.

• 

If the fault is not noticed, there is the danger that work will not be performed
correctly which can cause injury and damage.

• 

→ Therefore, always compare printouts with the screen display after printing them out. Correct
the printouts if they are faulty so that the content of the screen display matches that on the

Diagnostic system: reading out fault memory and activating systems

Installing oxygen sensor behind catalytic converter of cylinder bank 4-6

752