Code Definition

C1843 — Air Suspension Disable Switch Circuit Short To Ground

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

About C1843

C1843 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 C1843 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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.

C1843 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 C1843 is a manufacturer specific chassis code used on Ford and Lincoln vehicles equipped with air suspension, such as the Town Car, Expedition, and Navigator. The air suspension control module applies a sense voltage to the disable switch circuit and watches the returned signal to determine whether the system master switch is on or off. C1843 sets when that sense voltage is pulled permanently to ground, indicating the wiring or switch is shorted to chassis ground rather than switching normally. It is the short to ground variant in the same circuit family as C1840, C1841, and C1842. With th...

Join TaT to view the complete code information and diagnostic details.

Quick Facts