Code Definition

C1768 — Air Suspension Rear Height Sensor Low Signal Circuit Short To Ground

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

About C1768

C1768 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 C1768 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 lower 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.

C1768 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 C1768 is a Ford specific chassis code for the rear height sensor circuit in the four wheel air suspension system used on the Expedition, Lincoln Navigator, and related models. The rear height sensor operates as a voltage divider, returning a signal proportional to rear ride height so the air suspension control module can fill or vent the rear air springs to hold the correct trim height. C1768 is logged when the module detects the rear height sensor low signal circuit shorted to ground, pulling the height reading permanently out of range. With the fault present the module stops automatic re...

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