The control module detected a fault associated with the Oxygen (Lambda) Sensor B1 S1: Heater Return Coupling 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 19667. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).
Symptoms
MIL (Malfunction Indicator Light) active
Possible causes
Oxygen (Lambda) Sensor Heating Bank 1 Sensor 1 faulty
Recommended checks
Check Oxygen (Lambda) Sensor Heating Bank 1 Sensor 1
Powertrain: engine, transmission and driveline systems.
3
Manufacturer-defined range: the meaning can differ between brands.
211
Specific fault index within the subsystem.
Frequently asked questions about P3211
What does P3211 mean?
Oxygen (Lambda) Sensor B1 S1: Heater Return Coupling. The control module detected a fault associated with the Oxygen (Lambda) Sensor B1 S1: Heater Return Coupling 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 19667. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).
Is P3211 generic or manufacturer-specific?
P3211 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 P3211 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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