Code Definition

C1873 — Air Suspension RF Air Spring Solenoid Output Circuit Failure

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

About C1873

C1873 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 C1873 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

C1873 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

This code relates to the air suspension system. The air suspension control module operates the right front, or RF, air spring solenoid, a corner valve that admits or releases air at the right front air spring to control ride height at that corner. DTC C1873 sets when the module detects a fault on the RF air spring solenoid output circuit, such as an open, a short, or out of range current, when the solenoid is commanded. This is commonly caused by wiring faults, a failed solenoid coil, or connector corrosion. With this code set the right front corner may sag, sit high, or fail to level, ride qu...

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