DTC P0140: O2 Circuit No Activity Detected (Bank 1, Sensor 2)
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2012 Lincoln Navigator L, 2012 Lincoln Navigator, 2012 Lincoln MKZ, 2012 Lincoln MKX, and 2012 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.
P0140 - O2 CIRCUIT NO 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/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/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 |
| All | GO to PINPOINT TEST DW . | ||