Code Definition

C1894 — Air Suspension LR Height Sensor Circuit Open

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

About C1894

C1894 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 C1894 is stored, the module has detected an open (broken or disconnected) electrical path 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.

C1894 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

The air suspension system uses ride height sensors at each corner to report suspension position to the air suspension control module, often the Vehicle Dynamics Module on Ford applications. DTC C1894 sets when the module detects an open circuit in the left rear height sensor signal, supply, or ground circuit, meaning the sensor signal is missing or outside the valid electrical range. The height sensor is typically a rotary or linkage style device mounted between the body and the rear suspension arm, converting suspension travel into a varying voltage the module uses to control air spring fill ...

Join TaT to view the complete code information and diagnostic details.

Quick Facts