Code Definition

C1111 — ABS Power Relay Coil Open Circuit

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

About C1111

C1111 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 C1111 is stored, the module has detected an open (broken or disconnected) electrical path 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.

C1111 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

The ABS Power Relay supplies battery voltage to the ABS hydraulic unit, including the pump motor and solenoid valves, and the ABS module energises the relay coil to switch this power on. DTC C1111 specifically indicates an open circuit in the relay coil control circuit, meaning the module cannot pass current through the coil to close the relay. The open may be in the coil control wiring, the relay coil itself, or the supply and ground feeding the coil. When this code is present the ABS and traction control functions are disabled and the warning lamps illuminate, while normal hydraulic braking ...

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