This code indicates that the engine computer has detected a mismatch between two or more cruise control input signals. In other words, the signals from the cruise control switches or related pedal switches do not agree with each other as the computer expects. The system typically disables cruise control until the fault is resolved.
The steering wheel or stalk switch assembly that provides cruise inputs can wear internally, causing one or more signals to disagree with the others. This is the most common source of a correlation fault.
Corroded, chafed, or loose wiring between the cruise switch and the PCM can alter or drop one signal while others remain normal, triggering the correlation code.
The rotating electrical contact behind the steering wheel can develop an open or high-resistance circuit on one cruise input line, especially on higher-mileage vehicles.
The PCM compares cruise switch inputs with brake and clutch disengagement signals. A pedal switch that reports the wrong state can create a correlation conflict.
A rare cause. The computer may misinterpret valid inputs due to a software calibration issue or, very uncommonly, an internal input circuit failure. This should only be considered after all switch and wiring inputs are verified.
Yes, it generally does not affect engine operation or braking. The main inconvenience is that cruise control will likely be disabled until the fault is fixed.
Almost never. The correlation fault is normally caused by a switch, wiring, clock spring, or pedal position input disagreeing with the others. PCM replacement should be a last resort only after every input has been verified correct.
Yes. The clock spring carries cruise switch signals from the steering wheel to the rest of the vehicle, and a worn or damaged clock spring can drop one signal while others work, producing a correlation error.
Usually not. Most vehicles disable cruise control when this code is active as a safety measure, even if the buttons appear to respond intermittently.