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Nissan
PSA
VAG
P1799
Hold Switch Circuit
Nissan · engine
Data confidence
62%
The control module detected improper operation of the Hold Switch circuit. This is the manufacturer-specific definition used by Nissan.
TuningBot DTC Database · v4.37.15
P1799 Diagnostic Trouble Code (3 interpretations)
3 manufacturer-specific interpretations across 3 manufacturers in the TuningBot DTC database.
Nissan
1 interpretation
PSA
1 interpretation
P1799
Multifunction switch signal fault - Park/Neutral switch
PSA · engine
Data confidence
72%
The stored code identifies a fault of the Multifunction switch signal fault - Park/Neutral switch. Documented for the AL4 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.
Applies to
Peugeot AL4 automatic gearbox ECU
VAG
1 interpretation
P1799
Output Speed Sensor 2 Circuit RPM Too High
VAG · engine
Data confidence
62%
The control module detected that the Output Speed Sensor 2 Circuit RPM value was above the expected limit. This is the manufacturer-specific definition used by Volkswagen.
Applies to
Volkswagen
Related and nearby codes
How to read P1799
P
Powertrain: engine, transmission and driveline systems.
1
Manufacturer-defined range: the meaning can differ between brands.
799
Specific fault index within the subsystem.
Frequently asked questions about P1799
What does P1799 mean?
Diagnostic Trouble Code (3 interpretations). The control module detected improper operation of the Hold Switch circuit. This is the manufacturer-specific definition used by Nissan.
Is P1799 generic or manufacturer-specific?
P1799 is a manufacturer-specific code. In this database it is documented for: Nissan, PSA, VAG. The same number can mean something different on other brands.
Can TuningBot remove P1799 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