Component Location
General Description

HO2S(B1/S2) is in the rear side of Catalytic Converter to check the proper operation of catalyst. Oxygen density after the catalytic converter has to be within specific range (around 0.5V when there is no acceclation and deceleration.)

If the oxygen density changes in accordance with HO2S(B1/S1), it means the poor performance of catalytic converter.

DTC Description

If the counter that records rapid signal voltage changes is more than 5times, P2232 is set.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Rationality check

● Poor connection

● Short to power in signal circuit

● B1S2

Enable Conditions

● After enough heated

● Battery voltage > 10.7V

● Catalyst temperature (model) : 350~800℃

● Time after dew point end detected > 10 sec

Threshold Value

● Counter of [ ?ushk > 2V within 0.04 sec after heater on→off ] > 5 times

Diagnostic Time

● 2 driving cycle

※ △ushk : Sum of the signal voltage change value (B1S2)

※ B1S1 : upstream oxygen sensor / B1S2 : downstream oxygen sensor

Specification

Specification

0.1 ~ 0.9V

Schematic Diagram
note
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Signal Waveform
Яндекс.Метрика