Code Definition

C1140 — Hydraulic Base Brake Failure

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

About C1140

C1140 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.

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.

C1140 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

This chassis code relates to the hydraulic base braking system, the conventional foundation brake circuit that operates independently of the ABS pump and valves. DTC C1140 sets when the ABS or stability control module detects a fault in the base brake hydraulic system, such as a loss of brake fluid pressure, a pressure imbalance between circuits, or a brake fluid level that is critically low. The module monitors brake pressure sensors, the fluid level switch, and pedal travel to confirm the foundation brakes can develop normal pressure. When this code is set the ABS and stability functions are...

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