P2270 - O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 2)
WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2021 Lincoln Navigator, 2021 Lincoln Nautilus, 2021 Lincoln Corsair, 2021 Lincoln Aviator, and 2021 Ford Transit-350 HD. However, it is still accessible from the selected car via links, so may be relevant.
DTC DESCRIPTION P2270 - O2 SENSOR SIGNAL BIASED/STUCK LEAN (BANK 1 SENSOR 2)
| For Bronco Sport, 2.0L Corsair Edge Escape/Kuga, 2.0L Explorer, 2.3L Nautilus Ranger, 2.3L Transit Connect, 2.0L | |||
| Description: | This DTC sets when the heated oxygen sensor bank 1, sensor 2 (HO2S12) signal is less than the calibrated rich value during the current key cycle and, after three consecutive intrusive events, the signal cannot be forced greater than the calibrated rich value. | ||
| Possible Causes: |
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| Diagnostic Aids: | Check for leaks in the exhaust system. Check for an intermittent HO2S12 signal. | ||
| For All Others | |||
| Description: | The heated oxygen sensor bank 1, sensor 2 (HO2S12) is forced rich and lean and monitored by the PCM. This DTC sets when the PCM does not detect the output of the HO2S12 in a calibrated amount of time. | ||
| Possible Causes: |
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| Diagnostic Aids: | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Bronco Sport 2.0L, Corsair, Edge, Escape/Kuga 2.0L, Explorer 2.3L, Nautilus, Ranger 2.3L, Transit Connect 2.0L |
GO to Pinpoint Test DW. | ||
| All others | GO to Pinpoint Test H. | ||