P1720
Vehicle Speed Meter Circuit Malfunction
P1720 is an OBD-II diagnostic trouble code meaning: Vehicle Speed Meter Circuit Malfunction. Common causes: vehicle speed sensor (vss) malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Speedometer doesn't work
- Incorrect speed readings on the dashboard
- Gear shifting problems (for automatic transmissions)
- Cruise control not working
- Check Engine light comes on
Causes
- Vehicle Speed Sensor (VSS) malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Wiring harness fault
- Dashboard problems
How to Fix
- Check the condition of the speed sensor and its connector
- Check the integrity of the wires in the sensor circuit
- Measure the speed sensor resistance
- Check the sensor signal using an oscilloscope
- If necessary, replace the speed sensor
Related codes
Error P1720 by Vehicle Brand
FAQ
What does the P1720 code mean?
P1720 is an OBD-II diagnostic trouble code that indicates: Vehicle Speed Meter Circuit Malfunction
What causes a P1720 error code?
The most common causes of P1720 include: Vehicle Speed Sensor (VSS) malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Wiring harness fault.
How do I fix a P1720 diagnostic trouble code?
To fix P1720: Check the condition of the speed sensor and its connector. Check the integrity of the wires in the sensor circuit. Measure the speed sensor resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1720?
Limited driving only, diagnose soon
How much does it cost to fix P1720?
The estimated repair cost for P1720 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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