O2 Sensor Negative Current Control Circuit/Open (Bank 1, Sensor 1)
Ford · emissions
Data confidence94%
Ford documents P2251:13 (circuit open) for its 2024-2025 gasoline-engine OBD monitor strategy as o2 sensor negative current control circuit/open (bank 1, sensor 1). This three-byte interpretation is application-specific and identifies the detected monitor condition rather than a confirmed failed component.
Recommended checks
Perform a full module scan
Review freeze-frame and occurrence data
Inspect relevant wiring and connectors
Check power supplies and grounds
Compare commanded and measured values
Check applicable OEM service information
Applies toFord gasoline-engine OBD applications|2024-2025 model years
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
251
Specific fault index within the subsystem.
Frequently asked questions about P2251
What does P2251 mean?
O2 Sensor Negative Current Control Circuit/Open (Bank 1, Sensor 1). Ford documents P2251:13 (circuit open) for its 2024-2025 gasoline-engine OBD monitor strategy as o2 sensor negative current control circuit/open (bank 1, sensor 1). This three-byte interpretation is application-specific and identifies the detected monitor condition rather than a confirmed failed component.
Is P2251 generic or manufacturer-specific?
P2251 exists both as a generic OBD-II code (same meaning on every make) and with 1 manufacturer-specific interpretation(s): Ford. Always read it in the context of your vehicle.
Can TuningBot remove P2251 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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