Code Definition

C1258 — Speed Wheel LF Comparison Failure

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

About C1258

C1258 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.

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.

C1258 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 Anti-lock Brake System (ABS) module continuously compares the four wheel speed signals against each other during driving as a rationality check. DTC C1258 sets when the Left Front (LF) wheel speed sensor signal disagrees with the average of the other three wheels by more than the calibrated tolerance for longer than the calibrated time window, typically indicating that the LF reading is either too low, intermittently dropping out, or showing a fixed offset against the other wheels. The wheel speed sensor reports rotational speed to the module via a hall effect or active magnetic pickup rea...

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