heater AUDI A4 1998 B5 / 1.G AEB Engine Readiness Codes
Page 13 of 22
01-70
Explanation of 3-digit value in display fields 1
and 2
When display = 1
1
2
3
1 Oxygen Sensor (O2S) control active
1 Heated Oxygen Sensor (HO2S)
operational
1 Oxygen Sensor (O2S) heater ON
Note:
O2S control for bank 1 Oxygen Sensor (O2S)
after Three Way Catalytic Converter (TWC), B1-
S2), is not active at idle.
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