P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1): DTC Detecting Condition

P0134 O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR 1)

Item		Detecting Condition	Possible Cause
DTC Strategy	Case1	Signal plausibility during fuel cut-off	Poor connection or damaged harness HO2S contamination
DTC Strategy	Case2	Signal amplitude plausibility
Enable Conditions	Case1	fuel cut off active Fuel cut off phase 16g< Integrated Mass Air Flow since Fuel Cut-Off begin No relevant failure 10V< Battery voltage
Enable Conditions	Case2	Signal stroke valid Lambda controller not on the limit Lean/rich cycle time < 2.5 sec No relevant failure 10V< Battery voltage
Threshold Value	Case1	HO2S voltage at fuel-cut mode > 0.1V
Threshold Value	Case2	Upstream O2 sensor signal stroke < 0.25 V
Diagnostic Time	Case1	5 sec.
Diagnostic Time	Case2	120 sec.
MIL On Condition		2 Driving Cycles