The ECM sets DTC P0141 when it senses that resistance value of downstream O2 sensor heater is higher than threshold value.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Heater current check | 1. Poor connection 2. Open or short to ground in power circuit 3. Open in control circuit 4. S2 5. Corrosion |
Enable Conditions |
•
Battery voltage : 10.7V ~ 16.1V
•
Exhaust Gas temperature : 350 ℃(662 °F) ~ 600 ℃(1112 °F)
•
Engine stop time > 120 sec.
•
IAT > -9.8 ℃ | |
Threshold Value |
•
Internal resistance value > Threshold value | |
Diagnostic Time |
•
6 sec. | |
MIL ON Condition |
•
2 driving cycles |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
