Code Definition

C1179 — Speed Control Actuator Assembly Cable Slack Failure

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

About C1179

C1179 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.

C1179 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 with a cable operated speed control system, the cruise control actuator assembly opens the throttle through a control cable to maintain the driver set speed. The system runs a self check that measures how much cable travel is taken up before the throttle begins to move, and it expects only a small amount of free play. DTC C1179 sets when the module detects excessive slack in the actuator cable, meaning too much free travel exists before the throttle responds, so the actuator can no longer control road speed accurately. When this code is set the cruise control will usually refuse to...

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