Code Definition

C1126 — Cruise Control Command Switch Assembly Circuit Failure

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

About C1126

C1126 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 C1126 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

C1126 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 cruise control command switch assembly contains the driver operated switches for the cruise control system, commonly on, off, set, coast, resume, accelerate, and cancel. On many vehicles these switches form a resistive ladder so that each button produces a distinct voltage on a single signal wire that the control module reads. C1126 sets when the module detects a fault in this switch assembly circuit, such as a voltage outside the expected ranges, a shorted switch, or an open in the circuit. When this code is set the cruise control may be inoperative or behave erratically, and the module m...

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