Code Definition

C1731 — Air Suspension LF Corner Up Timeout

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

About C1731

C1731 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.

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.

C1731 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 C1731 is a manufacturer specific chassis code used in Ford and Lincoln four corner air suspension systems, most commonly seen on the Expedition and Navigator. The air suspension control module raises each corner by opening that corner's air spring solenoid while running the compressor, and it watches the corresponding ride height sensor to confirm the corner responds. C1731 is set when the module commands the left front corner to raise but the left front height sensor does not register the expected height change within the allowed time. This usually points to an air supply or delivery prob...

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