What does code P1900 mean on Mazda vehicles?
The turbine speed sensor signal is intermittent, causing incorrect transmission control.
OBD-II Code Mazda
P1900 — Mazda — Turbine Speed Sensor Circuit Intermittent
The turbine speed sensor signal is intermittent, causing incorrect transmission control.
Common symptoms
- Shift issues
- erratic shifting
Possible causes
- Faulty turbine speed sensor
- wiring intermittency
Initial recommendation
Test turbine speed sensor 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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