Cruise Control Related Malfunction
Your cruise control system has detected an electrical or mechanical problem and shut itself off for safety. Think of it like a malfunctioning autopilot that refuses to engage until the issue is fixed.
The ECM monitors cruise control switch signals, vehicle speed sensors, brake pedal input, and throttle position to verify the system is safe and functional. It checks for proper voltage levels, signal continuity, and logical consistency between multiple inputs.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Cruise Control Switch Voltage | 0-5V with valid state transitions | Open circuit, short to ground, or erratic signal |
| System Enable Logic | Vehicle speed >25 mph, brake released, engine running | System cannot verify safe operating conditions |
Code P0575 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0575 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.