Code Definition

C1230 — Speed Wheel Sensor Rear Centre Input Circuit Failure

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

About C1230

C1230 is a manufacturer-specific chassis diagnostic trouble code. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C1230 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.

C1230 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

On vehicles fitted with a rear centre wheel speed sensor, typically mounted on the rear differential, transfer case output, or driveshaft pickup, the ABS module continuously monitors the sensor input circuit for electrical integrity. DTC C1230 sets when the module detects a general electrical failure on the rear centre wheel speed sensor input circuit, which can include open circuits, intermittent signal loss, or signal characteristics that fall outside acceptable parameters. The rear centre sensor provides a redundant axle speed reference used by ABS, traction control, and stability control s...

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