Code Definition

C1A95 (08) — Wheel Speed Sensor Circuit Signal Invalid

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

About C1A95

C1A95 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 C1A95 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.

C1A95 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 module continuously monitors the wheel speed sensor input to confirm a plausible, stable frequency and voltage signal that corresponds with wheel rotation. DTC C1A95:08 is set when the module detects an invalid or implausible signal from the affected wheel speed sensor, such as erratic frequency, dropouts, or a signal that does not correlate with vehicle speed or other wheel speed inputs. This fault is typically logged when the signal integrity is compromised rather than completely open or shorted.

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