DTC P2270: - O2 Sensor Signal Stuck Lean - Bank 1, Sensor 2
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2009 Mercury Mountaineer, 2009 Mercury Milan, 2009 Mercury Mariner, 2009 Mercury Grand Marquis, and 2009 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2270: - O2 SENSOR SIGNAL STUCK LEAN - BANK 1, SENSOR 2
| Description: | The downstream heated oxygen sensor (HO2S) is forced rich and lean and monitored by the powertrain control module (PCM). The test fails if the PCM does not detect the output of the HO2S in a calibrated amount of time. | ||
| Possible Causes: |
|
||
| Diagnostic Aids: | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | - | GO to Pinpoint Test H . | GO to Pinpoint Test H . |