Code Definition

C1726 — Air Suspension Rear Pneumatic Failure

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

About C1726

C1726 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.

C1726 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 C1726 relates to the rear pneumatic section of the air suspension system. During leveling operations the air suspension control module commands the compressor and the rear air spring solenoid valves to add or vent air, and it expects to see a corresponding change in the rear ride height sensor reading within a calibrated time. This code sets when commanded rear air movement produces no adequate height change, indicating a pneumatic fault such as a leaking rear air spring, a failed compressor, a blocked or split air line, or a stuck solenoid valve. When C1726 is set the module typically sus...

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