When an output voltage is approximately 0.45V or 3.5V for more than pre-defined time, ECM sets DTC P0134.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Upstream O2 sensor heater performance monitoring | 1. Poor connector connection 2. Faulty related fuse 3. Open/short in power circuit 4. Open/short in heater control circuit 5. Faulty upstream O2 Sensor |
Enable Condition |
•
Exhaust gas temperature around O2 sensor is at between 350℃(662℉) and 650℃(1202℉)
•
Intake air temperature is higher than -7℃(19.4℉)
•
Battery voltage higher than 10.7 V and lower than 16.1 V | |
Threshold Value |
•
Internal resistance is greater than threshold value (Calculated by exhaust gas temp. or heating power) | |
Diagnosis Time |
•
15 sec. | |
MIL ON Condition |
•
3 driving cycles |
