Code Definition

C1845 — Air Suspension Front Inflator Solenoid Output Circuit Failure

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

About C1845

C1845 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 C1845 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.

C1845 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 C1845 is a manufacturer specific chassis code used on Ford and Lincoln vehicles with front or four corner air suspension, including the Lincoln Continental, Mark VIII, and Navigator. The front air spring carries an inflator (fill) solenoid that the air suspension control module energises to admit compressed air into the spring and de energises to trap it, and C1845 indicates the module has detected a failure in the output circuit driving that front inflator solenoid. The module compares the electrical feedback on the driver output against the commanded state, and stores the code when it se...

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