P2251 - O2 Sensor Negative Current Control Circuit Open - Bank 1, Sensor 1
WARNING: This page is about a different car, the 2014 Lincoln MKZ, 2014 Ford Fusion, and 2014 Ford C-Max. However, it is still accessible from the selected car via links, so may be relevant.
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: |
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| Diagnostic Aids: | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST DZ: UNIVERSAL HEATED OXYGEN SENSOR (HO2S) . | ||