DTC P0134: O2 Circuit No Activity Detected (Bank 1, Sensor 1)
P0134 - O2 CIRCUIT NO ACTIVITY DETECTED (BANK 1, SENSOR 1)
| For Vehicles With Universal HO2S | |||
| Description: | The powertrain control module (PCM) monitors the heated oxygen sensor (HO2S) for a lack of movement concern. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air/fuel ratio attempting to detect some movement in the signal value. The test fails when the PCM is unable to detect movement in the sensor signal while the air/fuel ratio is oscillating. | ||
| Possible Causes: |
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| Diagnostic Aids: | |||
| For Vehicles With HO2S (4-pin) | |||
| Description: | The powertrain control module (PCM) monitors the heated oxygen sensor (HO2S) for a lack of movement concern. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air/fuel ratio attempting to detect some movement in the signal value. The test fails when the PCM is unable to detect movement in the sensor signal while the air/fuel ratio is oscillating. | ||
| Possible Causes: |
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| Diagnostic Aids: | An HO2S PID switching across 0.45 volt from 0.2 to 0.9 volts indicates a normal switching HO2S. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Edge, Escape/Mariner 2.5L Automatic Transmission, Escape/Mariner 3.0L, E-Series 4.6L, E-Series 5.4L, Expedition, Explorer, F-150, Flex, F-Series Super Duty, Fusion 2.5L, Fusion 3.0L, Milan, MKS, MKT, MKX, Mustang, Navigator, Taurus |
GO to PINPOINT TEST DZ . | ||
| All others | GO to PINPOINT TEST DW . | ||