P1599 Code défaut de diagnostic (3 interprétations)

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.

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.

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.