DTC P0134 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

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DTC DESCRIPTION P0134 - O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR 1)

Description: If the sensor signal value is not changing from the default value, the PCM commands an oscillating air to fuel ratio attempting to detect some movement in the signal value. This DTC sets when the PCM is unable to detect movement in the sensor signal while the air to fuel ratio is oscillating.
Possible Causes: UO2SPC11 circuit open (if equipped) HO2S11 circuit open (if equipped) Deteriorating universal heated oxygen sensor bank 1, sensor 1 (HO2S11) (if equipped) Deteriorating HO2S11 (if equipped)
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
EcoSport 1.5L, KA	GO to PINPOINT TEST DW .
All others	GO to PINPOINT TEST DZ .