Code Definition

C1759 — Air Suspension Front Height Sensor High (SE) Signal Circuit Short To Ground

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

About C1759

C1759 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 C1759 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; a signal or supply voltage higher than the expected operating range; 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.

C1759 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

DTC C1759 is a Ford air suspension code indicating the suspension control module has detected the front height sensor signal circuit shorted to ground. The height sensor signal normally swings within its low voltage operating range as the suspension moves, so a signal held at or near zero volts tells the module the circuit is grounded rather than reporting genuine ride height. Common causes include the signal wire chafed through against the body or chassis, a pinched loom from previous repair work, water bridging the signal terminal to a ground pin in a connector, or an internal sensor fault. ...

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