Heated oxygen sensor (HO2S) 1, Bank 2 - lambda regulation, system too lean
VAG · emissions
Data confidence62%
The control module detected that the air-fuel mixture stayed leaner than the target despite full corrective control (Heated oxygen sensor (HO2S) 1, Bank 2 - lambda regulation, system). This is the manufacturer-specific definition used by Audi.
Possible causes
Intake leak
wiring
HO2S
Applies toAudi
P1147
Heated oxygen sensor lambda regulation, system too lean
VAG · emissions
Data confidence80%
The control module detected that the air-fuel mixture stayed leaner than the target despite full corrective control (Heated oxygen sensor lambda regulation, system). This is the manufacturer-specific definition used by Volkswagen.
Powertrain: engine, transmission and driveline systems.
1
Manufacturer-defined range: the meaning can differ between brands.
147
Specific fault index within the subsystem.
Frequently asked questions about P1147
What does P1147 mean?
Diagnostic Trouble Code (2 interpretations). The control module detected that the air-fuel mixture stayed leaner than the target despite full corrective control (Heated oxygen sensor (HO2S) 1, Bank 2 - lambda regulation, system). This is the manufacturer-specific definition used by Audi.
Is P1147 generic or manufacturer-specific?
P1147 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 P1147 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.