What does code P1901 mean on Mazda vehicles?
The torque converter clutch (TCC) circuit operates intermittently.
OBD-II Code Mazda
P1901 — Mazda — Torque Converter Clutch Circuit Intermittent
The torque converter clutch (TCC) circuit operates intermittently.
Common symptoms
- Shudder
- inconsistent lock-up
Possible causes
- Intermittent wiring fault
- failing TCC solenoid
Initial recommendation
Check TCC circuit wiring and connections.
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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