The control unit of the linear oxygen sensor built inside the PCM monitors short circuit error on all front Heated Oxygen Sensor (HO2S) control lines (VRC, VIP, VG, VN) and PCM sets P0131 with short circuit to ground.
If same code is set again in the next driving cycle, MIL is illuminated.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Electrical Monitoring | 1. Poor Connector Connection 2. Short to ground in Upstream O2 Sensor Signal Circuit 3. Defected Upstream O2 Sensor |
Enable Conditions |
•
Engine speed higher than 32 RPM
•
Battery voltage higher than 11 V and lower than 16 V
•
No relevant DTC present | |
Threshold Value |
•
Error bit information from HW circuit | |
Diagnostic Time |
•
Continuous | |
Mil On Condition |
•
2 Driving Cycle |
