Code Definition

C1251 — ABS Inlet Valve Coil LR Circuit Open

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

About C1251

C1251 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 C1251 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

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.

C1251 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 commands each wheel circuit's inlet valve closed during ABS or stability control events to isolate that wheel from master cylinder pressure. DTC C1251 is set when the ABS module's internal driver detects an open circuit on the Left Rear (LR) inlet valve coil, meaning no current is flowing when the coil is energised. The fault is typically electrical, with the module unable to sense expected coil resistance through the LR inlet valve solenoid winding inside the Hydraulic Control Unit (HCU). When this code is active, the ABS warning lamp will illuminate an...

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