When ECM detects short to ground in the heater control circuit(S1), ECM sets DTC P0031.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Heater check low | 1. Poor connection 2. Short to ground in control circuit 3. S1 |
Enable Conditions |
•
Battery voltage 10.7~16V | |
Threshold Value |
•
Short to ground | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
3 driving cycle |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
