Powertrain, generic · Fuel and air metering (injector circuit)

P0297 Vehicle Overspeed Condition

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

P0297 is a condition code: the engine module detects that road speed – from the vehicle speed sensor or wheel and output shaft speed – exceeded the calibrated maximum. Electronic speed limiters cut fuel or throttle at that limit, and the event is stored. Ford uses the code on its petrol trucks and stores it without the warning light; no manufacturer publishes a threshold. Common triggers are descending with a trailer beyond the limiter speed, wheelspin on the driven axle, a wrongly programmed tyre size or axle ratio, or spikes in the speed signal. Unlike P0219 it concerns road speed, not engine speed.

Likely causes

Limiter speed genuinely exceeded (downhill, trailer)
Wrong tyre size or axle ratio programmed, larger wheels fitted
Wheelspin on the driven axle
Speed signal disturbed (loose contact, interference, tone wheel)

Symptoms

  • Usually no warning light, code only stored
  • Vehicle limits speed at its maximum
  • With a disturbed signal: jumping speedometer, odd shifting

Repair estimate

DifficultyEasyDIY possible
Parts and labour€0–150
Time0.2–1 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

vehicle speed sensorengine control module

Related codes

P0219P0500P0501P0503P0049

References: roushcleantech.com, law.cornell.edu, en.wikipedia.org.