The control module detected a fault associated with the Pedal Correlation PDS1 and HPDS circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Ford.
TuningBot DTC Database · v4.37.15
P1256 Diagnostic Trouble Code (3 interpretations)
3 manufacturer-specific interpretations across 2 manufacturers in the TuningBot DTC database.
Ford
1 interpretation
VAG
2 interpretationsThe control module detected an interruption (open circuit) in the Engine coolant temperature (ECT) circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Audi.
Possible causes
- Wiring open circuit/short to positive
- ECT sensor
The control module detected a short circuit to battery voltage in the Engine Coolant Temperature Circuit (G62): Open / circuit. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 17664. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).
Symptoms
- Difficulties with starting a cold engine
- RPM at idle is irregular
- With all engine temperatures seldom idle rpm will vary between 900 - 1000 rpm
- Bad acceleration during warming up
Possible causes
- Wiring and/or connections faulty
- Engine Coolant Temperature Sensor (G62) faulty
Recommended checks
- Check wiring and connections
- Check / Replace Engine Coolant Temperature Sensor (G62)
Related and nearby codes
How to read P1256
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 P1256
What does P1256 mean?
Diagnostic Trouble Code (3 interpretations). The control module detected a fault associated with the Pedal Correlation PDS1 and HPDS circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Ford.
Is P1256 generic or manufacturer-specific?
P1256 is a manufacturer-specific code. In this database it is documented for: Ford, VAG. The same number can mean something different on other brands.
Can TuningBot remove P1256 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
