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 P0132 with short circuit to battery.
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. Air leak in Intake or Exhaust System 3. Defected Upstream O2 Sensor |
Enable Conditions |
•
Sensor Pump current valid
•
Battery voltage higher than 9V
•
Sensor Tip Temp. higher than 1184℉(640℃)
•
O2 sensor fored simulation active
•
P0420(Catalyst Diagnosis) monitoring active
•
P0133 diagnosis is synchronized with P0420 monitor
•
No relevant DTC present | |
Threshold Value |
•
Integral (Lambda signal amplitude measured / Lambda signal amplitude of a slow sensor) more than 1 | |
Diagnostic Time |
•
25 Lambda controller cycles | |
Mil On Condition |
•
2 Driving Cycle |
