Code Definition

C1751 — Vehicle Speed Sensor # 1 Output Circuit Short to Vbatt

System: Chassis  |  Type: Manufacturer-Specific  |  Make: Ford

About C1751

C1751 is a manufacturer-specific chassis diagnostic trouble code recorded for Ford vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C1751 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

C1751 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

On many Ford systems the ABS or speed control module receives the raw vehicle speed signal and rebroadcasts it as a buffered output to other consumers such as the PCM, instrument cluster, and speed control servo. DTC C1751 is set when the module detects battery voltage on this vehicle speed sensor number 1 output circuit when it should be driving the signal itself, indicating the output wire is shorted to a power feed. The fault therefore lies in the output wiring or in one of the connected consumer circuits rather than in the wheel speed or transmission speed sensor that generates the raw sig...

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