When the ECM/PCM detects an open in the HO2S(S1) heater control circuit, the ECM/PCM sets DTC P0030.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Evaluate Upstream O2 sensor heater performance | 1. Poor connection 2. Open circuit 3. HO2S(S1) |
Enable Conditions |
•
Engine speed during engine start (engine operating state out of start) > 640...960rpm depending on start ECT(engine operating state out of start)
•
Heater Pulse Width Modulation(PWM) > 1.56%
•
Upstream O2 sensor pre-heating phase finished 1) Upstream O2 Sensor operative readiness detected: [Upstream O2 Sensor tip temperature > 630°C or Time elapsed after dew-point exceeded > 30sec]
•
11V < Battery voltage < 16V | |
Threshold Value |
•
Upstream O2 sensor tip temperature < 680°C or Upstream O2 sensor tip temperature > 900°C | |
Diagnostic Time |
•
O2 tip temp < 650°C : 1sec, (650°C<O2 tip temp<680°C) or >900°C : 10sec. | |
Mil On Condition |
•
2 driving cycles. |
