The control module detected a short circuit to battery voltage in the Transmission Transfer Case Contact Plate 'C' circuit. This is the manufacturer-specific definition used by Ford.
TuningBot DTC Database · v4.37.15
P1856 Diagnostic Trouble Code (3 interpretations)
3 manufacturer-specific interpretations across 3 manufacturers in the TuningBot DTC database.
Ford
1 interpretation
Mercedes-Benz
1 interpretationThe control module detected improper operation of the Transmission shift lever recognition. This is the manufacturer-specific definition used by Mercedes-Benz.
Possible causes
Transmission shift lever control module
VAG
1 interpretationThe control module registered the fault condition described as "Throttle Pedal Position Sensor A Circuit Error Message From Engine Control". This is the manufacturer-specific definition used by Volkswagen.
Related and nearby codes
How to read P1856
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 P1856
What does P1856 mean?
Diagnostic Trouble Code (3 interpretations). The control module detected a short circuit to battery voltage in the Transmission Transfer Case Contact Plate 'C' circuit. This is the manufacturer-specific definition used by Ford.
Is P1856 generic or manufacturer-specific?
P1856 is a manufacturer-specific code. In this database it is documented for: Ford, Mercedes-Benz, VAG. The same number can mean something different on other brands.
Can TuningBot remove P1856 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
