ItalianoIT
DeutschDE
EspañolES
PortuguêsPT
FrançaisFR
РусскийRU
Jaguar
Land Rover
Nissan
VAG
P1789
Ignition Supply Malfunction
Jaguar · engine
Data confidence
62%
The control module detected improper operation of the Ignition Supply. This is the manufacturer-specific definition used by Jaguar.
TuningBot DTC Database · v4.37.15
P1789 Diagnostic Trouble Code (4 interpretations)
4 manufacturer-specific interpretations across 4 manufacturers in the TuningBot DTC database.
P · PowertrainEngineOBD2
Jaguar
1 interpretation
Land Rover
1 interpretation
P1789
Torque converter clutch (TCC) solenoid - closed circuit
Land Rover · transmission
Data confidence
62%
The control module detected improper operation of the Torque converter clutch (TCC) solenoid - closed circuit. This is the manufacturer-specific definition used by Land Rover.
Possible causes
- Wiring
- TCC solenoid
- ECMfTCM
Nissan
1 interpretation
P1789
Pressure Control Solenoid B Circuit Shorted
Nissan · transmission
Data confidence
62%
The control module detected a fault associated with the Pressure Control Solenoid B Circuit Shorted circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Nissan.
VAG
1 interpretation
P1789
Idle Speed Intervention Circuit Error Message From Engine Control
VAG · engine
Data confidence
62%
The control module registered the fault condition described as "Idle Speed Intervention Circuit Error Message From Engine Control". This is the manufacturer-specific definition used by Volkswagen.
Applies to
Volkswagen
Related and nearby codes
How to read P1789
P
Powertrain: engine, transmission and driveline systems.
1
Manufacturer-defined range: the meaning can differ between brands.
789
Specific fault index within the subsystem.
Frequently asked questions about P1789
What does P1789 mean?
Diagnostic Trouble Code (4 interpretations). The control module detected improper operation of the Ignition Supply. This is the manufacturer-specific definition used by Jaguar.
Is P1789 generic or manufacturer-specific?
P1789 is a manufacturer-specific code. In this database it is documented for: Jaguar, Land Rover, Nissan, VAG. The same number can mean something different on other brands.
Can TuningBot remove P1789 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