Code Definition

C1A94 — Right Front Wheel Speed Sensor Circuit Fault

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

About C1A94

C1A94 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 C1A94 is stored, the module has detected 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.

C1A94 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 the right front wheel speed sensor signal to determine wheel rotation speed and compare it with the other three wheel speed inputs. Modern Ford vehicles use an active wheel speed sensor (typically hall effect or magneto resistive) that generates a square wave digital signal as the tone ring teeth or magnetic encoder ring pass by, powered by a regulated voltage feed from the ABS module. DTC C1A94 is set when the module detects an implausible, missing, or erratic signal from the right front sensor, or when the sensor circuit voltage or frequency falls outside spec...

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

Quick Facts