The control module detected a fault associated with the Oxygen (Lambda) Sensor B1 S1: Internal Resistance Implausible circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 19722. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).
Powertrain: engine, transmission and driveline systems.
3
Manufacturer-defined range: the meaning can differ between brands.
266
Specific fault index within the subsystem.
Frequently asked questions about P3266
What does P3266 mean?
Oxygen (Lambda) Sensor B1 S1: Internal Resistance Implausible. The control module detected a fault associated with the Oxygen (Lambda) Sensor B1 S1: Internal Resistance Implausible circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 19722. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).
Is P3266 generic or manufacturer-specific?
P3266 is a manufacturer-specific code. In this database it is documented for: VAG. The same number can mean something different on other brands.
Can TuningBot remove P3266 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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