DTC P2232 O2 Sensor Signal Circuit Shorted To Heater Circuit (Sensor 2): DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSES

Item	Detecting Condition	Possible Cause
DTC Strategy	Rationality check	Poor connection Short to power in signal circuit B1S2 ECM/PCM
Enable Conditions	After enough heated Battery voltage > 10.7V Catalyst temperature (model) < 800°C (1472°F) Time after dew point end detected > 10 sec
Threshold Value	Counter of [ Δ ushk > 2V during 0.04 secafter heater on-->off] > 5 times
Diagnostic Time	2 driving cycle
Δushk: Sum of the signal voltage change value (B1S2) * B1S1: upstream oxygen sensor / B1S2: downstream oxygen sensor