Code Definition

C1156 — Speed Wheel Sensor LF Circuit Open

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

About C1156

C1156 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 C1156 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; and a sensor-related fault — the reported value from the named sensor is out of spec.

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.

C1156 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 control module monitors each wheel speed sensor circuit for proper electrical continuity and signal output. DTC C1156 sets when the module detects an open circuit in the left front (LF) wheel speed sensor circuit, meaning no valid speed signal is reaching the module from that wheel. The wheel speed sensor produces a signal as the tone ring teeth pass its tip, and the module uses this to calculate individual wheel speed for ABS, traction control, and stability control functions. When this code sets, the ABS, traction control, and stability control systems are typically disabled and thei...

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