When ECM detects open in the OCV(Exhaust) control circuit, ECM sets DTC P0078.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Circuit continuity check, low | 1. Poor connection 2. Short to ground in control circuit 3. OCV(Exhaust) |
Enable Conditions |
•
Coolant temperature is higher than -5℃.
•
Time after engine start is higher than 3.5s | |
Threshold Value |
•
Open | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
2 driving cycle |
