OBD Guide
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P1574

ASCD Vehicle Speed Sensor

P1574 is an OBD-II diagnostic trouble code meaning: ASCD Vehicle Speed Sensor. Common causes: ascd speed sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can 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

  1. Check the integrity of the sensor wiring and connectors
  2. Test speed sensor resistance
  3. Check the sensor signal using an oscilloscope
  4. Replace faulty speed sensor
  5. Reflash or replace the ASCD control module if necessary

Related codes

P0500P0501P0571

Error P1574 by Vehicle Brand

BuickCadillacChevroletChryslerFordGMGMCLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1574 code mean?

P1574 is an OBD-II diagnostic trouble code that indicates: ASCD Vehicle Speed Sensor

What causes a P1574 error code?

The most common causes of P1574 include: ASCD speed sensor malfunction; Open or short circuit in the sensor circuit; Connector problems or contact corrosion; ASCD control module malfunction.

How do I fix a P1574 diagnostic trouble code?

To fix P1574: Check the integrity of the sensor wiring and connectors. Test speed sensor resistance. Check the sensor signal using an oscilloscope. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1574?

Yes, but get it checked soon

How much does it cost to fix P1574?

The estimated repair cost for P1574 is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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