When the PCM detects a short to ground in the HO2S(S1) heater control circuit , the PCM sets DTC P0031.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Electrical check. | 1. Poor connection 2. Short to ground in control circuit 3. HO2S(S1) |
Enable Conditions |
•
IG ON. | |
Threshold Value |
•
Short to ground. | |
Diagnostic Time |
•
Continuous. | |
Mil On Condition |
•
2 driving cycles. |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
