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 |
•
Signal voltage monitoring | 1. Poor connector connection 2. Short/open in upstream O2 sensor signal circuit 3. Faulty upstream O2 sensor |
General Enable Condition |
•
30 sec. elapsed after upstream dew point end detected
•
Fuel feedback control active
•
Battery voltage is higher than 11V
•
Exhaust gas temperature is at between 400℃(752℉) and 800℃(1472℉)
•
No injector error
•
No upstream O2 sensor heater error | |
Enable Condition |
•
- | |
Threshold Value |
•
Upstream O2 sensor voltage is at between 0.4V and 0.6V | |
Diagnosis Time |
•
5 sec. | |
MIL ON Condition |
•
3 driving cycles |
