P0574 Cruise Control System - Vehicle Speed Too High

P0574 indicates the cruise control system detected vehicle speed too high for the requested cruise operation. The cruise logic is seeing speed outside its allowed operating range.

Code details

Generic OBD-II · P0

System: Speed / Idle
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace cruise switches before verifying vehicle speed data and module configuration.

Symptoms of P0574

Unstable, high, or low idle, or stalling.
Erratic speedometer, cruise-control, or shift behaviour.
Check-engine light with a hesitation or surge.

Common causes of P0574

A dirty throttle body, idle-control valve, or throttle-position sensor.
A failing vehicle-speed or wheel-speed sensor, or its wiring.
Vacuum leaks or a related sensor forcing the idle/speed strategy.

Useful checks before replacing parts

Compare vehicle speed data, cruise enable status, set speed request, VSS data from multiple modules, freeze-frame speed, and wheel speed sensor inputs.
Inspect vehicle speed signal plausibility, tire size programming, module calibration, speed sensor faults, and cruise switch operation.
Road-test while graphing vehicle speed and cruise request data to confirm whether speed is accurate or falsely reported high.

Related OBD-II codes

These nearby speed / idle entries can help compare wording and pin down the fault area.