P0297 — Vehicle overspeed condition

The monitor identifies vehicle speed above the calibrated overspeed condition. The code records a speed-related operating state and does not by itself identify a failed speed sensor or control module; the threshold, speed source, vehicle configuration and event context must be checked in the manufacturer’s information.

Affected system: Vehicle-speed monitoring

Symptoms

• An engine warning light may illuminate; some vehicles may limit power following a recorded overspeed event.

Possible causes

• The monitored speed may have exceeded the configured limit; wheel slip or an inaccurate speed signal can also affect the recorded value.

What to check

• Review the event context, associated codes and available freeze-frame information; compare speed readings and inspect the relevant circuit only if the data are inconsistent.

Also written as: P0297-00, P029700, PO297 (some scan tools add the fault-type byte, e.g. -00).