Reduction of drag in mode D activation fault (neutral)
PSA · engine
Data confidence72%
The stored code identifies a fault of the Reduction of drag in mode D activation fault (neutral). Documented for the AM6/AT6 automatic gearbox ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models. PSA documentation does not characterise the failure mode further.
Powertrain: engine, transmission and driveline systems.
1
Manufacturer-defined range: the meaning can differ between brands.
839
Specific fault index within the subsystem.
Frequently asked questions about P1839
What does P1839 mean?
Reduction of drag in mode D activation fault (neutral). The stored code identifies a fault of the Reduction of drag in mode D activation fault (neutral). Documented for the AM6/AT6 automatic gearbox ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models. PSA documentation does not characterise the failure mode further.
Is P1839 generic or manufacturer-specific?
P1839 is a manufacturer-specific code. In this database it is documented for: PSA. The same number can mean something different on other brands.
Can TuningBot remove P1839 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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