Mechanical or hydraulic fault on the engine brake function in the first sequential mode : Coherence
PSA · engine
Data confidence72%
The control module detected that the Mechanical or hydraulic fault on the engine brake function in the first sequential mode was not coherent with related operating data. Documented for the AM6/AT6 automatic gearbox ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Powertrain: engine, transmission and driveline systems.
1
Manufacturer-defined range: the meaning can differ between brands.
838
Specific fault index within the subsystem.
Frequently asked questions about P1838
What does P1838 mean?
Mechanical or hydraulic fault on the engine brake function in the first sequential mode : Coherence. The control module detected that the Mechanical or hydraulic fault on the engine brake function in the first sequential mode was not coherent with related operating data. Documented for the AM6/AT6 automatic gearbox ECU on Peugeot applications; the same PSA control units are also fitted to Citroën models.
Is P1838 generic or manufacturer-specific?
P1838 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 P1838 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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