What does code P1720 mean on Mazda vehicles?
The ECU detects an error in the secondary vehicle speed sensor (VSS 2) signal.
OBD-II Code Mazda
P1720 — Mazda — Vehicle Speed Sensor 2 Signal Error
The ECU detects an error in the secondary vehicle speed sensor (VSS 2) signal.
Common symptoms
- Speedometer malfunction
- shift issues
Possible causes
- Faulty VSS 2
- wiring fault
Initial recommendation
Test vehicle speed sensor 2 and inspect wiring.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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