What it means
The control module detects vehicle speed above the calibrated limit for cruise control operation.
At a glance
- Usually lights the check-engine light
How it works
The cruise-control system checks vehicle speed before allowing cruise to set and while it is operating. This code is set when the reported speed exceeds the calibrated limit for cruise operation, either because the vehicle is actually above that limit or because a speed signal or cruise-control input is incorrect.
Common causes
Most likely first.
- Vehicle speed exceeded the cruise control operating limit
- Incorrect vehicle speed signal from a sensor or related circuit
- Cruise control switch or control fault
Symptoms
- Check-engine light may come on
- Cruise control may disengage or become unavailable
- Cruise control may not set at the current speed
How to diagnose it
- Review freeze-frame data to see the speed reported when the code set and whether cruise was being requested.
- Compare scan-tool vehicle-speed data with the dashboard speed reading during a safe, steady-speed drive to check for an implausible signal.
- Check for other vehicle-speed sensor or circuit codes that could explain an incorrect speed reading.
- Inspect the speed-signal wiring and connectors, along with the cruise switch or control inputs, for damage or poor connections.
- Test the relevant speed-signal and cruise-control circuits against the manufacturer's specification before suspecting a control-module fault.
Common fixes
- Disengage cruise and reduce speed if the vehicle is above its permitted cruise operating limit.
- Reconnect or clean a loose or corroded speed-signal or cruise-control connector.
- Repair damaged wiring affecting the vehicle-speed signal.
- Replace a failed speed sensor or cruise switch only after testing confirms the fault.
- Repair the related control module if speed inputs and wiring are correct but the code persists.
Can I keep driving?
Drive manually and obey posted speed limits; do not attempt to set cruise if the displayed speed is inaccurate or the system disengages unexpectedly. The code generally affects cruise availability, but an unreliable speed reading can also make other speed-dependent functions behave unpredictably.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.