P0140 - Circuit Activity Detected (Bank 1, Sensor 2)
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DTC DESCRIPTION P0140 - CIRCUIT ACTIVITY DETECTED (BANK 1, SENSOR 2)
| 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: |
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| Diagnostic Aids: | An O2S12 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 |
| All | GO to Pinpoint Test DW . | ||