Cooling circuit by-pass electrovalve
PSA · engine
Data confidence72%
The stored code identifies a fault of the Cooling circuit by-pass electrovalve. Documented for the Siemens SID 803 injection ECU (DW10BTED4 2.0 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models. PSA documentation does not characterise the failure mode further.
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?
Diagnostic Trouble Code (3 interpretations). The stored code identifies a fault of the Cooling circuit by-pass electrovalve. Documented for the Siemens SID 803 injection ECU (DW10BTED4 2.0 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models. PSA documentation does not characterise the failure mode further.
Is P1599 generic or manufacturer-specific?
P1599 is a manufacturer-specific code. In this database it is documented for: PSA, 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 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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