P1574
ASCD Vehicle Speed Sensor
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)
Symptoms
- Cruise control doesn't work
- ASCD system indicator flashes
- Floating speed readings on the dashboard
- Spontaneous shutdown of cruise control
Causes
- ASCD speed sensor malfunction
- Open or short circuit in the sensor circuit
- Connector problems or contact corrosion
- ASCD control module malfunction
- Mechanical damage to the drive mechanism
How to Fix
- Check the integrity of the sensor wiring and connectors
- Test speed sensor resistance
- Check the sensor signal using an oscilloscope
- Replace faulty speed sensor
- Reflash or replace the ASCD control module if necessary