If the signal output satisfies the threshold value under enable conditions, ECM/PCM sets DTC P0134.
(This DTC might be caused by the malfunction of Heater circuit, so, check the heater circuit first.)
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Rationality check | 1. Poor connection 2. Open or short in signal circuit 3. HO2S(S1) |
Enable Conditions |
•
Dew point end detected
•
Fuel feed back control active
•
Battery voltage is greater than 11V
•
Exhaust Gas temperature is between 280℃ and 800℃
•
No injector error
•
No upstream O2 sensor heater error | |
Threshold Value |
•
Sensor voltage : 0.4~0.6V | |
Diagnostic Time |
•
10 sec. | |
Mil On Condition |
•
3 driving cycles |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
