DTC Information: DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	Circuit check	Fuse blown or missing Heater control circuit open or short Power supply circuit open or short Poor connection or damaged harness Faulty downstream HO2S
Enable Conditions	O2 sensor pre-heating phase finished (dew point passed) No relevant failure Coolant temperature drop since the last engine stop > 25°C (77°F) Battery voltage between 11 - 16V O2 sensor heater control duty between 3.5 - 96.5% O2 sensor operative ready (to ensure no open circuit failure present)
Threshold Value	HO2S internal resistance is higher than 10000Ω to 18000Ω
Diagnostic Time	130s
MIL ON Condition	2 driving cycles