What does code P1256 mean?

Q: What does code P1256 mean?

Pedal Correlation PDS1 and HPDS. P1256 on Ford vehicles indicates that the Powertrain Control Module (PCM) has detected a disagreement between the two independent accelerator pedal position signals, specifically the Pedal Demand Sensor 1 (PDS1) and the High-resolution Pedal Demand Sensor (HPDS). The PCM expects these two signals to track proportionally at all times, and when their correlation falls outside the calibrated tolerance, it stores this code and typically illuminates the wrench or check engine light.

DTC codes / Ford codes / P1256

P1256 · FordPedal Correlation PDS1 and HPDS

P1256 on Ford vehicles indicates that the Powertrain Control Module (PCM) has detected a disagreement between the two independent accelerator pedal position signals, specifically the Pedal Demand Sensor 1 (PDS1) and the High-resolution Pedal Demand Sensor (HPDS). The PCM expects these two signals to track proportionally at all times, and when their correlation falls outside the calibrated tolerance, it stores this code and typically illuminates the wrench or check engine light.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.