catalytic converter AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual

24-49


Heated Oxygen Sensor
(HO2S) before Three Way
Catalytic Converter (TWC),
checking

Heated oxygen sensor, checking

Notes:

G39 = Heated Oxygen Sensor (HO2S), bank
1
G108 = Heated Oxygen Sensor (HO2S) 2, bank
2
Functional check of HO2S -G39- or -G108-
Repair Group 01, Read measuring value block,
display group 010 or 041

- Disconnect Heated Oxygen Sensors (HO2S) -
G39- or -G108- harness connector (component
locations page 24
-1 ).

If continuity is not obtained: -
Switch multimeter (Fluke 83 or equivalent) to measure resistance ( )
and check for continuity between terminal 4 oxygen sensor signal wire
(measured at oxygen sensor connector) and engine Ground (GND).
Pa
ge 1 of 7 Heated Ox
yg
en Sensor
(HO2S
) before Three Wa
y Catal
ytic Converter
(TWC
), checkin
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