P0576
UniversalCruise Control Input Circuit Low
The vehicle detected a signal voltage that is lower than expected in the cruise control input circuit. This circuit carries driver commands, such as setting or canceling cruise control, to the system that manages cruise operation. The fault may stop cruise control from working or make its controls respond inconsistently; it does not by itself identify a failed part.
⚠️ Before You Begin (Safety First)
A cruise control fault is usually not an immediate driving hazard, but do not rely on cruise control until the issue is diagnosed. If cruise control behaves unexpectedly or the vehicle does not respond normally to your commands, switch it off and pull over safely if needed.
Common Symptoms
- Cruise control may not engage because the system cannot reliably detect a driver command.
- Cruise control buttons may respond intermittently if the signal is affected by a loose or damaged connection.
- A cruise control warning or fault message may appear, depending on the vehicle.
- There may be no noticeable symptom beyond a stored code, especially if the condition is intermittent.
Common Causes
- A damaged wire or connector may allow the input signal to be pulled low.
- A short to ground or another unwanted electrical path may lower the circuit signal.
- A cruise control switch may have an internal fault or fail to produce the expected signal.
- Corrosion, looseness, or contamination at a connector may interfere with the input circuit.
- A fault in the circuit's power, ground, or control-module input may cause the detected low signal.
Diagnostic Steps
- Check whether cruise control is unavailable or behaving inconsistently, and note when the symptoms occur.
- Inspect accessible cruise control buttons and wiring for obvious damage, without removing the steering wheel or trim that may contain airbag components.
- Check the vehicle's owner information for any relevant cruise-control warning messages or listed fuse checks; replace a fuse only with the specified type and rating.
- If you have a compatible scan tool, record related codes and check whether cruise switch inputs change when the controls are pressed.
- If the code returns or wiring tests are needed, have the circuit checked using vehicle-specific service information rather than probing airbag-related wiring.
When to Call a Professional
Use a scan tool to check related codes and, where available, observe cruise switch input data while operating the controls. Then test the circuit using the vehicle-specific wiring diagram and service information. Check for unwanted grounding, damaged wiring, poor connections, and a faulty switch or control input before replacing parts.
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Commonly Asked Questions
Does P0576 prove that the cruise control switch is bad?
No. It reports a low signal in the cruise control input circuit. Wiring, connectors, grounding, or the control-module input can also cause that condition.
Can I drive with P0576?
The code alone usually does not prevent normal driving, but cruise control may not work correctly. Do not use it until the issue is resolved, and stop safely if vehicle speed control behaves unexpectedly.
Why might cruise control still work sometimes?
An intermittent connection, damaged wire, or switch fault can affect the input only under certain conditions. Scan data and circuit checks can help identify when the signal drops.
Will replacing the cruise control switch necessarily fix the code?
No. Diagnosis should confirm the signal problem and its cause before parts are replaced. Exact circuit tests depend on the vehicle's model, year, and engine.
Browse Available Code Guides
Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.