Code Definition

C1889 — Air Suspension LF Height Sensor Circuit Failure

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

About C1889

C1889 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 C1889 is stored, the module has detected 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.

C1889 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 a left front ride height sensor to report the front corner height to the air suspension control module so it can add or vent air and keep the vehicle level. DTC C1889 sets when the module detects a general fault in the left front height sensor circuit, such as an open, a short, or an out of range signal that does not correspond to suspension travel. The sensor is typically a rotary unit linked to the suspension arm that returns a varying signal as the corner moves through its range. When this code is set the front of the vehicle may sit low or fail to level, a su...

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