P2251 - O2 Sensor Negative Current Control Circuit/Open (Bank 1 Sensor 1)
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 P2251 - O2 SENSOR NEGATIVE CURRENT CONTROL CIRCUIT/OPEN (BANK 1 SENSOR 1)
| Description: | This DTC sets when a concern is detected with the circuit used to determine the oxygen content in the exhaust gas. | ||
| Possible Causes: |
|
||
| Diagnostic Aids: | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test DZ. | ||