Idle control - lean running speed above specification
VAG · engine
Data confidence62%
The control module detected a fault associated with the Idle control - lean running speed above specification circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Audi.
Possible causes
IAC valve
Applies toAudi
P1599
Idle control - lean running speed above specification
VAG · engine
Data confidence62%
The control module detected a fault associated with the Idle control - lean running speed above specification 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.
Powertrain: engine, transmission and driveline systems.
1
Manufacturer-defined range: the meaning can differ between brands.
599
Specific fault index within the subsystem.
Frequently asked questions about P1599
What does P1599 mean?
Idle control - lean running speed above specification. The control module detected a fault associated with the Idle control - lean running speed above specification circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Audi.
Is P1599 generic or manufacturer-specific?
P1599 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 P1599 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.