The stored code identifies a fault of the Neutral detection fault (in mode D). 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.
TuningBot DTC Database · v4.37.15
P17A9 Neutral detection fault (in mode D)
1 manufacturer-specific interpretation across 1 manufacturer in the TuningBot DTC database.
PSA
1 interpretationRelated and nearby codes
How to read P17A9
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Frequently asked questions about P17A9
What does P17A9 mean?
Neutral detection fault (in mode D). The stored code identifies a fault of the Neutral detection fault (in mode D). 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 P17A9 generic or manufacturer-specific?
P17A9 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 P17A9 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.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic
