HO2S12 Signal Stuck Rich
Ford · emissions
Data confidence94%
Ford documents P2271:00 (no sub type information) for its 2024-2025 gasoline-engine OBD monitor strategy as ho2s12 signal stuck rich. 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
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.
271
Specific fault index within the subsystem.
Frequently asked questions about P2271
What does P2271 mean?
O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2. The control module registered the fault condition described as "O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2".
Is P2271 generic or manufacturer-specific?
P2271 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 P2271 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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