What causes a P0574 code?

P0574 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a P0574 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0574 active.

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

OBD-II

P0574

Vehicle Speed Cruise Control System - Speed Too High

What it means

The Engine Control Module (ECM) has detected that the vehicle speed signal has exceeded the maximum allowable threshold for the cruise control system to operate safely.